興亜開発 List of Products and Services

Our company is engaged in the investigation and analysis of soil and groundwater contamination, as well as remediation work. Based on the expertise we have cultivated as a group of ground specialists (Geo-Doctors), we analyze the extent and conditions of contamination and propose purification methods according to the contaminants and remediation objectives. We are currently offering a document that briefly introduces the investigation and remediation methods for "historical surveys, soil surveys, and purification work." You can view it immediately via PDF download. [Contents] ■ What is a historical survey? ■ What is a soil survey? ■ What is purification work?

• Geological Survey Company
• Site and ground investigation
• Geological Survey

At Kyoa Development, we are engaged in "geothermal utilization construction" using nearby natural energy. Geothermal energy is a type of natural energy that is not affected by weather and can be utilized stably at any time without restrictions. We carry out everything from ground surveys to installation work in-house, and our experienced engineers will propose suitable geothermal utilization construction plans. 【Features】 ■ Develop suitable geothermal utilization plans considering the conditions of the target area, usage, and costs ■ Provide explanations about subsidy systems, etc. ■ Conduct everything from ground surveys and groundwater surveys to design and construction in-house ■ Propose necessary surveys and other related matters *For more details, please refer to the PDF materials or feel free to contact us.

• Other civil engineering works
• Site and ground investigation
• Heat and Drying Treatment Systems

At Kyoa Development, we conduct "well drilling" that requires specialized knowledge and know-how regarding ground conditions and groundwater. Well drilling is important to select the appropriate construction method considering the ground (soil) conditions, groundwater situation, and surrounding environment. Our company carries out everything from ground surveys to impact prediction analysis and construction in-house, with experienced engineers proposing suitable construction plans. 【Features】 ■ Experts in ground and groundwater manage the site ■ We provide high-quality construction with a speedy and flexible response to site conditions ■ We also offer aftercare services such as maintenance after construction completion *For more details, please refer to the PDF materials or feel free to contact us.

• Other civil engineering works
• Site and ground investigation

At Kyoa Development, we conduct the "Auris Survey," which utilizes the reflection phenomenon of elastic waves to non-destructively examine the length and integrity of structures. By using elastic waves in the high-frequency range of 10 kHz to 100 kHz, we can detect the locations of cracks and other issues within the structure. Additionally, we are registered with NETIS and have obtained patents for "Dynamic Diagnosis Methods for Piles or Structures" and "Shape Diagnosis Methods for Natural Structures." 【Features】 ■ Easily measure length ■ Capable of surveying bridge piers, PC piles, PHC piles, H steel piles, steel sheet piles, wooden piles, stone columns, bedrock, and more ■ Can measure the length of piles under footings and steel sheet piles under caulking (superstructure) ■ Can investigate the presence of buckling, cracks, and other issues *For more details, please refer to the PDF materials or feel free to contact us.

• Non-destructive testing
• Other Management Services

At Kyoa Development, we conduct "submarine exploration," which allows for detailed investigations that are difficult to understand from surveys conducted at sea (on ships). Divers go underwater to carry out visual inspections and use handheld portable magnetic survey devices for the investigation. It is possible to accurately identify the specific locations of hazardous materials on the seabed. 【Services Offered】 ■ Preliminary survey (understanding the target area) ■ Setting the exploration area ■ Conducting submarine exploration ■ Creating submarine exploration result maps ■ Preparing and submitting exploration reports *For more details, please refer to the PDF materials or feel free to contact us.

• Non-destructive testing
• Other Management Services

At Kyoa Development, we conduct "acoustic wave exploration," which allows for detailed investigations and deep surveys by changing the sound source and frequency. By emitting sound waves towards the seabed and observing reflections at acoustic impedance boundaries, we can understand the geological structure beneath the sea surface. We consistently carry out everything from measurement to analysis in-house, providing rapid and highly accurate exploration results. 【Features】 ■ Detailed investigations and deep surveys are possible by changing the sound source and frequency. ■ A wide range of surveys offered: - Investigation of burial conditions in ports and shipping routes using parametric acoustic wave exploration. - Surveys of active faults in coastal areas and other shallow marine investigations. - Geological structure surveys at depths of several hundred meters using boomer and sparker technologies. *For more details, please refer to the PDF materials or feel free to contact us.

• Non-destructive testing
• Other Management Services

At Kyoa Development, we conduct "electrical exploration," which measures the differences in the flow of electric current by passing current through the ground. This allows us to understand the presence of groundwater, stratigraphic composition, the shape of landslide surfaces, geological conditions, and underground cavities. Traditionally, vertical exploration, which measures the resistivity in the depth direction at specific points, was the main method used. However, in the field of civil engineering geology, two-dimensional resistivity exploration has become the mainstream method. 【Features】 〈Two-Dimensional Resistivity Exploration〉 ■ Capable of exploration in terrains with elevation differences ■ A method that does not involve vibrations or noise during fieldwork ■ Fewer operational constraints as it does not use hazardous materials such as explosives ■ Three-dimensional exploration is also conducted *For more details, please refer to the PDF materials or feel free to contact us.

• Non-destructive testing
• Other Management Services

At Kōa Development, we conduct "elastic wave exploration," which is triggered by sources near the surface (such as explosives or hammers) and investigates geological structures and engineering information such as the hardness and softness of the ground through differences in the propagation speed of elastic waves (P-waves) in the ground. We also evaluate stratification, rock classification, and geological area classification based on the results of elastic wave exploration. Currently, high-density elastic wave exploration, which allows for detailed placement of receiving points and the analysis of velocity inversion layers, has become mainstream. 【Features】 〈High-Density Elastic Wave Exploration〉 ■ Can grasp a wide range of ground structures in a short time ■ Can detect velocity inversion layers that could not be analyzed with conventional elastic wave exploration ■ Ground experts analyze and evaluate the exploration results ■ Provides engineering information about the ground estimated from elastic wave velocities *For more details, please refer to the PDF document or feel free to contact us.

• Non-destructive testing
• Other Management Services

At Kyoa Development, we conduct "magnetic surveys" such as vertical magnetic surveys (land) and horizontal magnetic surveys (land and offshore). By measuring magnetic anomalies from the surface to underground, we can estimate the presence, depth, and planar distribution of buried objects without damaging the surface. While it is often used for bomb detection, it can also be utilized for detecting iron materials such as iron pipes and sheet piles. 【Business Activities】 ■ Vertical magnetic surveys (land) ■ Horizontal magnetic surveys (land) ■ Horizontal magnetic surveys (offshore) *For more details, please refer to the PDF materials or feel free to contact us.

• Non-destructive testing
• Other Management Services

At Kyoa Development, we conduct borehole exploration and radar surveys. The radar survey service illuminates the ground with electromagnetic waves and measures the reflected waves to reveal information about the subsurface (voids, buried objects, buried pipes). Our company utilizes its extensive experience and know-how to set the appropriate frequency (antenna) for each target, providing the best data possible. 【Services Offered】 ■ Radar Survey ■ Borehole Exploration *For more details, please refer to the PDF document or feel free to contact us.

• Non-destructive testing
• Other Management Services

At Kyoa Development, we conduct maintenance management operations such as tunnel and bridge inspections. Since the conditions (backfill, foundation ground, concrete thickness, structure, etc.) vary for each target structure, experience and advanced know-how are required. Our company proposes maintenance management methods that achieve maximum effectiveness at minimal cost by utilizing our achievements in soil investigations and various exploration and testing techniques. 【Business Content】 ■ Tunnel Maintenance Management ・Visual and sound inspections ・Radar ■ Bridge Inspections ・Touch, visual, and sound inspections *For more details, please refer to the PDF materials or feel free to contact us.

• Non-destructive testing
• Other Management Services

At Kyoa Development, we are engaged in various system development initiatives, CIM, and residential disaster prevention efforts. Our focus is primarily on improving the quality and efficiency of operations in the fields related to ground and groundwater. Additionally, as part of our efforts in CIM, we provide the creation of three-dimensional models of the ground and three-dimensional analysis. 【Service Contents】 ■ Efforts in CIM - Creation of three-dimensional models of the ground - Three-dimensional analysis ■ System Development *For more details, please refer to the PDF materials or feel free to contact us.

• Other civil engineering services
• others

At Kyoa Development, we conduct information management and spatial analysis using GIS. We mainly propose geographic spatial information management, information processing, and spatial analysis related to ground and groundwater. We provide customized methods according to our clients' objectives. 【Service Contents】 ■ Spatial Information Management ■ Spatial Analysis Processing ■ Spatial Information Processing *For more details, please refer to the PDF document or feel free to contact us.

• Other civil engineering services
• others

At Kōa Development, we conduct damage prediction simulations, create regional disaster prevention plans and disaster prevention maps, and carry out damage surveys during disasters. We also support resident briefing sessions and various disaster prevention meetings, as well as disaster prevention courses in kindergartens and schools. As experts in soil and water, our company is committed to disaster prevention efforts, predicting and disseminating disaster risks, and proposing methods to mitigate those risks. 【Service Contents】 ■Damage Prediction (Simulation) ■Disaster Prevention Plans ■Disaster Prevention Maps and Information ■Damage Surveys *For more details, please refer to the PDF materials or feel free to contact us.

• Other civil engineering services
• others

At Kyoa Development, we provide designs related to ground and groundwater. We carry out slope design, retaining wall design, pile foundation design, ground improvement design, river embankment design, and pumping well design. Based on our extensive experience in ground investigation, we propose suitable designs by setting ground constants appropriate for the current conditions. 【Design Contents】 ■ Slope Design ■ Retaining Wall Design ■ Pile Foundation Design ■ Ground Improvement Design ■ River Embankment Design ■ Pumping Well Design *For more details, please refer to the PDF materials or feel free to contact us.

• Other earthworks, foundation works, and exterior floors
• Other civil engineering services
• Facility Design

Kyoa Development primarily conducts analyses related to ground and groundwater. In "Groundwater Analysis," we carry out everything from investigation to analysis and groundwater level reduction work consistently in-house, responding swiftly to sudden analysis requests during construction. We leverage our years of experience in ground and groundwater surveys to provide highly accurate analysis results that closely reflect real phenomena. [Analysis Contents] ■ Ground Analysis ■ Groundwater Analysis *For more details, please refer to the PDF materials or feel free to contact us.

• Other earthworks, foundation works, and exterior floors
• Surveying Consulting
• Other civil engineering services

At Kyoa Development, we conduct "Indoor Soil Testing and Rock Testing," where we perform laboratory tests on soil and rock samples collected on-site to evaluate the physical, chemical, strength, and deformation characteristics of the ground. The "Indoor Soil Testing" is carried out using sampling materials (undisturbed samples and disturbed samples) to understand the physical and mechanical properties of the ground. Additionally, we accommodate special tests that are not covered by JIS or JGS standards, providing the data that our clients require. Our testing centers are located in two places: Kanto (Chiba City, Chiba Prefecture) and Kansai (Sakai City, Osaka Prefecture), and we also welcome clients to attend the tests. 【Features】 ■ Indoor testing ■ Support for special tests beyond JIS and JGS standards ■ Provision of data required by clients ■ Attendance at tests is also supported *For more details, please refer to the PDF materials or feel free to contact us.

• Other earthworks, foundation works, and exterior floors
• Surveying Consulting
• Other civil engineering services

At Kyoa Development, we conduct "on-site measurements" to assess ground conditions, groundwater levels, and structural deformations at the site. Depending on the purpose, measurements may be conducted over the long term and continuously, in which case we may employ methods such as automatic measurements. We also customize measurement equipment according to the purpose, target, required accuracy, and measurement duration. We provide on-site measurements tailored to our customers' needs. 【Features】 ■ Measure ground conditions, groundwater levels, and structural deformations on-site ■ Customize measurement equipment according to purpose, target, required accuracy, and measurement duration ■ Provide on-site measurements tailored to customer needs *For more details, please refer to the PDF document or feel free to contact us.

• Other earthworks, foundation works, and exterior floors
• Surveying Consulting
• Other civil engineering services

At Kyoa Development, we conduct "in-situ tests" to understand ground characteristics at the site. Since tests can be performed in situ, we obtain data that is not affected by factors such as confining pressure and sampling disturbance, compared to methods that involve collecting soil samples and conducting laboratory tests. We provide appropriate planning and execution of in-situ tests according to the purpose and target ground. 【Features】 ■ Investigation to understand ground characteristics in situ ■ Data obtained is not affected by confining pressure and sampling disturbances ■ We provide appropriate planning and execution of in-situ tests according to the purpose and target ground *For more details, please refer to the PDF document or feel free to contact us.

• Other earthworks, foundation works, and exterior floors
• Surveying Consulting
• Other civil engineering services

"Boring surveys" are the most fundamental method of geological investigation. By using a boring machine to excavate and observe the collected samples, the composition of the strata can be understood. Generally, a standard penetration test is conducted during excavation to measure the N value (an indicator of the relative density and hardness of the ground). Our company plans and proposes sampling during boring, as well as various tests and investigations utilizing the borehole, as needed, providing all the ground information required by our customers. 【Features】 ■ Understanding of strata composition ■ Investigation of ground strata composition using a boring machine ■ Provision of all ground information required by customers *For more details, please refer to the PDF document or feel free to contact us.

• Other earthworks, foundation works, and exterior floors
• Surveying Consulting
• Other civil engineering services

At Kōa Development, engineers visit the site to observe the topography and geological conditions, conducting a "surface geological survey" to investigate the characteristics of the ground and bedrock. This survey is conducted to understand the geological properties, engineering properties, and hydraulic characteristics of the foundation ground in the target area, and to estimate and clarify the formation of the topography and geology, as well as the geological structure, based on their planar and spatial distribution. The data from the surface geological survey plays an important role in the interpretation of results from boring surveys and physical exploration. 【Features】 ■ Engineers visit the site to observe the topography and geological conditions ■ Investigation of the characteristics of the ground and bedrock *For more details, please refer to the PDF document or feel free to contact us.

• Other earthworks, foundation works, and exterior floors
• Surveying Consulting
• Other civil engineering services

In addition to purification, there are measures such as solidification, containment, and diffusion prevention. Unlike purification work, contaminants do not disappear, so the designation of areas will depend on the measures implemented, as follows: (1) The required action area will be lifted, but it will be designated as an area requiring notification upon change of condition. (2) It will remain a required action area and will not be lifted. Our company offers proposals for measures tailored to the target area, backed by a wealth of skilled engineers. 【Types of measures other than purification】 ■ The required action area will be lifted, but it will be designated as an area requiring notification upon change of condition. ■ It will remain a required action area with no lifting of the designation. *For more details, please refer to the PDF materials or feel free to contact us.

• Surveying Consulting
• Environmental Survey
• Water Treatment

At Kyoa Development, we will formulate a purification plan based on the "Oil Pollution Control Guidelines - Considerations for Landowners and Others in Response to Oil Odor and Oil Film Issues Caused by Soil Containing Mineral Oils." Additionally, we conduct everything in-house, from ground surveys to soil investigations, analysis, simulations, and construction, with experienced technicians proposing suitable purification plans for oil-contaminated soil. 【Features】 ■ Experienced technicians develop purification plans for oil-contaminated soil ■ In-house execution from ground surveys to soil investigations, analysis, simulations, and construction ■ Proposals for suitable purification plans for oil-contaminated soil *For more details, please refer to the PDF document or feel free to contact us.

• Surveying Consulting
• Environmental Survey
• Water Treatment

At Kyoa Development, we are engaged in "purification measures (specific harmful substances)" to cleanse contaminated soil. It is important to select appropriate purification methods considering the types of contaminants and the target ground (soil). This requires specialized knowledge and know-how regarding contaminants and the ground. Our company conducts everything from ground surveys to soil surveys, analysis, simulation, and construction in-house, and our experienced technicians will propose suitable purification plans. 【Features】 ■ Purification of contaminated soil ■ In-house execution of ground surveys, soil surveys, analysis, simulation, and construction ■ Experienced technicians propose suitable purification plans *For more details, please refer to the PDF materials or feel free to contact us.

• Surveying Consulting
• Environmental Survey
• Water Treatment

At Kōa Development, we also handle special investigations for natural origins and landfill sites. "Special investigations" are conducted when specific special conditions are met. These may be carried out in parallel with regular investigations. The methods of investigation vary depending on various conditions, and these tasks require a wide range of expertise and know-how. Our company continuously provides education and training for the engineers engaged in these tasks, ensuring that we deliver speedy and highly accurate investigation results. 【Special Investigations】 ■ Natural Origin Special Investigation ■ Landfill Site Special Investigation ■ Article 5 Special Investigation *For more details, please refer to the PDF materials or feel free to contact us.

• Surveying Consulting
• Geological Survey
• Environmental Survey

At Kōa Development, we conduct "certification surveys" to obtain certification for land designated in specific areas. The density and methods of the survey vary depending on factors such as the depth of contamination and the condition of fill brought in from outside. Soil at depths where contamination has been confirmed cannot receive certification. There are two types of survey methods: pre-excavation surveys and post-excavation surveys. These tasks require a wide range of specialized knowledge and know-how. Our company continuously provides education and training for the technicians engaged in these tasks, enabling us to deliver speedy and highly accurate survey results. 【Features】 ■ Environmental survey drilling machine (Eco Machine) - Capable of soil sampling without using excavation water by applying vibration and rotation to the cutting edge - Generates minimal excavation waste, resulting in less contaminated soil to store and process - Fast excavation speed and easy machine mobility ■ Providing speedy and highly accurate survey results *For more details, please refer to the PDF materials or feel free to contact us.

• Surveying Consulting
• Geological Survey
• Environmental Survey

In the "Soil Contamination Investigation Analysis and Impact Prediction Services," we conduct predictive analyses (groundwater contamination simulations) and risk assessments regarding the spread of harmful substances and purification effects. Our company utilizes the experience gained from soil contamination investigations and purification work to carry out appropriate modeling, conducting validation analyses of the models as much as possible, and providing high-quality analyses. We also offer proposals for the next step of purification countermeasure construction. 【Features】 ■ Cause investigation ■ Future predictions ■ Effect predictions of countermeasure construction ■ Effect predictions of purification countermeasures *For more details, please refer to the PDF materials or feel free to contact us.

• Surveying Consulting
• Geological Survey
• Environmental Survey

At Kyoa Development, we conduct chemical analyses of soil, sediment, water quality, and industrial waste, and we perform "Soil and Groundwater Analysis." By conducting soil and groundwater analysis, we quantify the concentration of harmful substances in the soil and groundwater. Our company provides official methods such as notifications from the Ministry of the Environment and JIS standards. 【Features】 ■ Conduct chemical analyses of soil, sediment, water quality, and industrial waste ■ Quantify the concentration of harmful substances in soil and groundwater ■ Provide official methods such as notifications from the Ministry of the Environment and JIS standards *For more details, please refer to the PDF document or feel free to contact us.

• Surveying Consulting
• Geological Survey
• Environmental Survey

At Kyoa Development, we conduct a "Detailed Survey" as the next step following the overview investigation. The "Detailed Survey" is a depth investigation of contamination conducted when soil pollution is confirmed (when specific harmful substances exceed the standard values). Since the methods of investigation vary depending on the depth of the contamination source and the soil and geological conditions, these tasks require a wide range of specialized knowledge and know-how. Our company continuously provides education and training for the technicians engaged in these tasks, enabling us to deliver speedy and highly accurate investigation results. 【Features】 ■ Environmental investigation drilling machine (Eco Machine) - Generates minimal excavation waste, resulting in less contaminated soil storage and processing - Fast excavation speed and easy machine mobility - Capable of drilling up to 20-30 meters ■ Providing speedy and highly accurate investigation results *For more details, please refer to the PDF materials or feel free to contact us.

• Surveying Consulting
• Geological Survey
• Environmental Survey

At Kyoa Development, we conduct contamination confirmation surveys as the next step following historical investigations. The "Overview Survey" involves collecting and analyzing soil and soil gas samples to determine the presence of soil contamination by specific hazardous substances at 10-meter intervals. The density of the investigation and the sampling methods vary depending on the location of potential contamination (such as surface, below buried pipes, under pits, or former ground surfaces) and the types of specific hazardous substances. These tasks require a wide range of specialized knowledge and expertise. Our company continuously provides education and training for the technicians engaged in these tasks, ensuring that we deliver speedy and highly accurate survey results. **Features** - Experienced technicians conduct soil and soil gas sampling. - In cases of mandatory surveys under prefectural regulations, we perform investigations and report results in accordance with legal requirements. - We provide speedy and highly accurate survey results. *For more details, please refer to the PDF materials or feel free to contact us.*

• Surveying Consulting
• Geological Survey
• Environmental Survey

At Kōa Development, we conduct "Soil Contamination Risk" investigations based on existing materials such as maps and aerial photographs. This investigation involves collecting information regarding land use history and the history of hazardous substance usage, and it is required to identify the types of specific hazardous substances and assess the risk of contamination based on this information. These tasks require a wide range of specialized knowledge and expertise. Our company provides ongoing education and training for the technicians engaged in these tasks, ensuring that we deliver speedy and highly accurate investigation results. 【Features】 ■ Experienced technicians extract investigation points ■ Conduct thorough material investigations and interviews without omissions ■ Capable of investigating the historical location records of past facilities that no longer exist, the history of hazardous substance usage, and the status of notifications to authorities, as well as land development history such as embankments and excavations ■ In cases of mandatory investigations under prefectural regulations, we conduct investigations and report results in accordance with legal requirements *For more details, please refer to the PDF materials or feel free to contact us.

• Surveying Consulting
• Geological Survey
• Environmental Survey

At Kyoa Development Co., Ltd., we propose survey methods and plans that are suited to your objectives and current situation, including simulations and consulting in the field of geological surveys. Our engineers visit the site to observe the topography and geological conditions, starting with "surface geological surveys," and conduct investigations such as "boring surveys" and "in-situ tests." During the surveys and tests, we provide situation reports (interim reports) as needed, and we continuously share information with our clients to facilitate discussions on changes to the survey/test content or additional tests based on the circumstances. 【Features】 ■ Proposing suitable geological survey plans based on over 60 years of experience ■ Guaranteeing highly reliable geological surveys and tests ■ Providing detailed reports for situation understanding and smart progress management *For more details, please refer to the PDF materials or feel free to contact us.

• Other earthworks, foundation works, and exterior floors
• Surveying Consulting
• Other civil engineering services

In the field of non-destructive testing (maintenance management), we conduct rapid investigations using our own exploration equipment to assess the integrity of existing structures, underground structures (buried pipes, unexploded ordnance, etc.), underground cavities, and geological characteristics, all without damaging surface coverings such as asphalt or concrete. 【Content Overview *Partial】 ◆ Radar Exploration Radar exploration services illuminate the ground with electromagnetic waves and measure the reflected waves to reveal information about underground conditions (cavities, buried objects, buried pipes). ◆ Magnetic Exploration Magnetic exploration is used for investigating buried objects underground (primarily for bomb detection). While it is often used for bomb detection, it can also be utilized for detecting iron objects such as iron pipes and sheet piles.

• Other earthworks, foundation works, and exterior floors
• Surveying Consulting
• Other civil engineering services