吉光組 List of Products and Services

Are you facing any of these issues with construction-generated soil? - Want to reduce the amount of leftover soil disposal? - Disposal costs are high? - It's difficult to find a disposal site that will accept it? ⇒ The self-propelled soil improvement machine 'Litera Method' can solve these problems! Since it is self-propelled, it recycles the soil discharged from the construction site on-site using cement or lime. This results in cost reduction compared to disposing of the soil. Furthermore, it can be operated in narrow yards, and due to its high improvement efficiency, the amount of untreated soil falling off is greatly reduced. With less dust, it can be operated in residential areas and alongside roads. 【Features】 ■ Prevention of environmental destruction and elimination of secondary pollution ■ Significant cost reduction made possible by on-site processing ■ High-quality assurance due to high-performance soil improvement machinery ■ Can be operated in narrow yards ■ High improvement efficiency greatly reduces the amount of untreated soil falling off ■ With less dust, it can be operated in residential areas and alongside roads *For more details, please download the materials or contact us through our website.

• Special Construction Method

Are you facing any of these issues with construction-generated soil? - I want to reduce the amount of leftover soil… - Disposal costs are high… - It's difficult to find a disposal site that will accept it… ⇒ The self-propelled soil improvement machine 'Liter Method' solves these problems! Since it is self-propelled, it recycles the soil discharged from the construction site on-site using cement and lime. This results in cost savings compared to disposing of the soil. Additionally, it can be operated in narrow yards, and due to its high improvement efficiency, the amount of untreated areas significantly decreases. With less dust, it can be operated in residential areas and alongside roads. ■ What is the Embankment Regulation Law? From the perspective of protecting the lives and bodies of citizens from disasters caused by embankments, this law comprehensively regulates dangerous embankments nationwide, regardless of the land use or purpose of the embankment. ~ Background ~ In 2021, a large-scale landslide disaster occurred in Atami City, Shizuoka Prefecture, due to heavy rain causing embankments to collapse. There are also areas where regulations regarding dangerous embankments are not necessarily sufficient. Therefore, it has been decided to comprehensively regulate dangerous embankments regardless of land use. *For more details, please download the materials or contact us via our website.

• Special Construction Method

This document is a shipping list for "Metal Shut and Oil Shut" handled by our company. We introduce items such as "Shipping Date," "Product Name," and "Target Substance." Our company started in 1924 (the 13th year of the Taisho era) with gravel extraction from the Tedori River. Since then, we have expanded into civil engineering projects such as road improvement works, and from the 1990s, we have broadened our business to include soil improvement, construction, and housing projects. Please take a moment to read through it. 【Listed Items】 ■ Shipping Date ■ Client ■ Product Name ■ Target Substance ■ Construction Location ■ Shipping Quantity *For more details, please refer to the PDF document or feel free to contact us.

• Soil improvement material

This document is a record of construction achievements by Yoshimitsu Corporation. It includes various items such as "Date," "Client," "Volume of Soil Improvement," and "Solidifying Agent." Our company started in 1924 (Taisho 13) with gravel extraction from the Tedori River. Since then, we have begun civil engineering projects such as road improvement works, and from the 1990s, we have expanded our business into soil improvement, construction, and housing projects. We invite you to read it. 【Included Items (Partial)】 ■ Date ■ Client ■ Project Name ■ Project Location ■ Contractor *For more details, please refer to the PDF document or feel free to contact us.

• Special Construction Method

We would like to introduce the features of the "TNF Method," implemented by Yoshimitsu Corporation, which has over 1,300 achievements nationwide. We carry out ground improvement to create an artificial bedrock suitable for buildings on weak ground across the country. Since we do not use piles, the demolition costs during building dismantling are also reduced. Please feel free to contact us when needed. 【Features】 ■ Approximately 30% cost reduction compared to conventional methods (pile foundation) (for a total floor area of 1,000 m² and pile length of 30 m) ■ Construction period shortened by 50% compared to conventional methods, as pile work, formwork work, and ground preparation work are not required (for a total floor area of 1,000 m² and pile length of 30 m) *For more details, please refer to the related links or feel free to contact us.

• Ground foundation construction method

We would like to introduce the features of the "TNF Method," implemented by Yoshimitsu Corporation, which has over 1,300 successful projects nationwide. We carry out ground improvement to create an artificial bedrock suitable for buildings on soft ground across the country. Compared to conventional methods, there is no need for pile work, formwork, or foundation work, allowing for a 50% reduction in construction time (for a total floor area of 1,000 m² and pile length of 30 m). Please feel free to contact us when you need our services. 【Features】 ■ Approximately 30% cost reduction compared to conventional methods (pile foundation) (for a total floor area of 1,000 m² and pile length of 30 m) ■ No piles are used, which also reduces demolition costs when dismantling buildings *For more details, please refer to the related links or feel free to contact us.

• Ground foundation construction method

We would like to introduce the features of the "TNF Method," implemented by Yoshimitsu Corporation, which has over 1,300 achievements nationwide. In soft ground across the country, we perform ground improvement to create an artificial bedrock suitable for the building. Compared to conventional methods (pile foundations), we can achieve approximately 30% cost reduction (for a total floor area of 1,000 m² and pile length of 30 m). Please feel free to contact us when you need our services. 【Features】 - Compared to conventional methods, there is no need for pile work, formwork work, or ground preparation work, resulting in a 50% reduction in construction time (for a total floor area of 1,000 m² and pile length of 30 m). - Since no piles are used, the demolition costs during building dismantling are also reduced. *For more details, please refer to the related links or feel free to contact us.

• Ground foundation construction method

At Yoshimitsu Corporation, we carry out ground improvement work to create artificial bedrock in soft ground across the country, tailored to the specific buildings. Compared to pile foundations, we achieve approximately 30% cost reduction. Since pile work, formwork work, and ground preparation work are not required, the construction period is shortened by 50%. Please feel free to contact us when you need our services. 【Features】 ■ Approximately 30% cost reduction compared to conventional methods (pile foundations) (for a floor area of 1000 m² and pile length of 30 m) ■ Construction period shortened by 50% compared to conventional methods, as pile work, formwork work, and ground preparation work are not required (for a floor area of 1000 m² and pile length of 30 m) ■ No piles used, resulting in reduced demolition costs when dismantling the building *For more details, please refer to the related links or feel free to contact us.

• Ground foundation construction method

The "Self-Propelled Soil Improvement Machine Litera" is a mobile recycling plant manufactured and sold by Komatsu Ltd. It is suitable for "contaminated soil remediation projects," which require high quality, and being self-propelled, it recycles soil discharged from the construction site on-site using cement or lime. Please feel free to contact us when needed. 【Features】 ■ Compared to conventional methods (backhoe mixing), it has a higher workload and consistently good quality. ■ It reduces costs compared to disposing of soil. ■ It contributes to CO2 reduction and carbon neutrality as there is no deforestation due to soil disposal. *For more details, please refer to the related links or feel free to contact us.

• Special Construction Method

We would like to introduce the features of the mobile recycling plant "Self-Propelled Soil Improvement Machine Litera," manufactured and sold by Komatsu Manufacturing Co., Ltd. By eliminating deforestation caused by soil disposal, it contributes to CO2 reduction and carbon neutrality. Being self-propelled, it recycles soil discharged from construction sites on-site using cement and lime. Please feel free to contact us when you need assistance. 【Features】 ■ Compared to conventional methods (backhoe mixing), it has a higher workload and consistently good quality. ■ It results in cost reduction compared to disposing of soil. ■ It is suitable for "contaminated soil remediation projects" that require high quality. *For more details, please refer to the related links or feel free to contact us.

• Special Construction Method

We would like to introduce the features of the mobile recycling plant "Self-Propelled Soil Improvement Machine Litera," manufactured and sold by Komatsu Manufacturing Co., Ltd. Since it is self-propelled, it recycles soil discharged from construction sites on-site using cement and lime. This results in cost savings compared to disposing of the soil. Please feel free to contact us when you need assistance. 【Features】 ■ Compared to conventional methods (backhoe mixing), it has a higher workload and consistently better quality. ■ It contributes to CO2 reduction and carbon neutrality by eliminating deforestation caused by soil disposal. ■ It is suitable for "contaminated soil remediation projects" that require high quality. *For more details, please refer to the related links or feel free to contact us.

• Special Construction Method

We would like to introduce the features of the mobile recycling plant "Self-Propelled Soil Improvement Machine Litera," manufactured and sold by Komatsu Manufacturing Co., Ltd. Since it is self-propelled, it recycles soil discharged from construction sites on-site using cement and lime. Compared to conventional methods (backhoe mixing), it has a higher workload and consistently delivers better quality. Please feel free to contact us when you need assistance. 【Features】 ■ Cost reduction compared to disposing of soil ■ Contributes to CO2 reduction and carbon neutrality by eliminating deforestation caused by soil disposal ■ Suitable for "contaminated soil remediation projects" that require high quality *For more details, please refer to the related links or feel free to contact us.

• Special Construction Method

The "Self-Propelled Soil Improvement Machine Litera" is a mobile recycling plant manufactured and sold by Komatsu Ltd. Being self-propelled, it recycles soil discharged from construction sites on-site using cement and lime. Due to the high volume of work, the quality is consistently good, leading to cost reductions. Please feel free to contact us when you need assistance. 【Features】 ■ Compared to conventional methods (backhoe mixing), it has a higher workload and consistently good quality. ■ It results in cost reductions compared to disposing of soil. ■ It contributes to CO2 reduction and carbon neutrality by eliminating deforestation caused by soil disposal. ■ It is suitable for "contaminated soil remediation projects" that require high quality. *For more details, please refer to the related links or feel free to contact us.

• Special Construction Method

The "Litera Method" is a construction technique that uses a self-propelled soil improvement machine called "Litera" to mix soil and solidifying agents on construction sites. It can be implemented in narrow yards and has high improvement efficiency, significantly reducing the drop of untreated areas. Due to the low dust generation, it can also be carried out in residential areas and alongside roads. Examples of this method's application include "safety measures for tunnel entrance skin collapse" and "dust control" construction cases. 【Features】 ■ Prevention of environmental destruction and elimination of secondary pollution ■ Significant cost reduction made possible by on-site processing ■ High-quality assured due to the use of high-performance soil improvement machinery ■ Feasible in narrow yards ■ High improvement efficiency greatly reduces the drop of untreated areas ■ Low dust generation allows for implementation in residential areas and alongside roads *For more details, please refer to the PDF materials or feel free to contact us.

• Special Construction Method

We introduce a suitable construction method for the burial of tanks and piping at gas stations. By applying the "WT method," we form a container that houses buried facilities such as tanks in improved ground. By combining it with the "TNF method," we integrate the ground behavior of gas stations on soft ground, protecting buried facilities from earthquakes and ground subsidence. Additionally, it eliminates the need for sheet piles and supports, achieving a reduction in construction time and costs. 【Features】 ■ Suitable for soft ground - No uplift due to the absence of piles, preventing damage to piping - Applying the TNF method under buildings and in external areas prevents damage to underground facilities ■ Achieves low cost and reduced construction time - Eliminates the need for sheet piles and supports, resulting in reduced construction time and costs *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Ground improvement

The "WT Method" is a construction technique that improves underground areas such as parking lots using the TNF method to create a reservoir consisting of walls on four sides and a bottom slab. By forming the contact surface between the bottom slab and the underlying ground in a grid pattern, it maintains the stability of the structure even on soft ground. Additionally, since the improved ground serves as a container, construction work such as rebar and concrete is almost unnecessary. It allows for construction in a shorter period compared to conventional storage facilities. 【Features】 ■ Easy to construct even on soft ground or ground with a high water table ■ Almost no need for construction work such as rebar and concrete since the improved ground acts as a container ■ Allows for construction in a shorter period compared to conventional storage facilities ■ Can be freely shaped, enabling the installation of oil tanks and piping systems *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Ground improvement

The "TNF+ (Plus) Method" enhances the "TNF Method (a shallow improvement method with a grid-like structure)" by applying columnar improvements to the bottom layer, making the ground even more solid and protecting buildings from weak ground. The improved layer can be formed into various shapes, allowing for the free installation of underground structures. At the time of land return, a pipe water jet is injected into the installed pipes, instantly crushing the improved body using water pressure. 【Features】 ■ The columnar improvement section encloses the soil in the lower part of the improved layer, achieving a solid ground. ■ A new method applicable to mid-rise and high-rise buildings. ■ The improved layer can be formed into various shapes, allowing for the free installation of underground structures. ■ By installing pipes in the columnar section, geothermal utilization such as heat pumps is possible. ■ High-pressure water is injected from the pipes installed in the columnar section to crush the improved body. ■ The improved body can be dismantled in a short period, reducing the cost of restoring the land to its original state. *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Ground improvement

We would like to introduce our "TNF Hybrid Method." After ground improvement using the "TNF Method," we install log piles from the improved layer. This compacts the loose sandy ground that causes liquefaction, improves the ground, and provides stable support for buildings. Additionally, the use of log piles (wood) contributes to carbon storage, helping to reduce CO2 emissions. 【Features】 ■ Low-cost liquefaction countermeasures ■ CO2 emission reduction ■ Compacts loose sandy ground and improves the foundation ■ Provides stable support for buildings *For more details, please refer to the PDF document or feel free to contact us.

• Ground foundation construction method
• Ground improvement

The "T-BAGS Seismic Isolation Method" involves laying two layers of T-BAGS, sandwiched with a special sheet, beneath the floor slab and under the foundation. During an earthquake, the sliding of the T-BAGS absorbs the building's vibrations. Due to its extremely high durability, regular maintenance is not required. Additionally, by combining it with the TNF method, it is possible to construct on soft ground and reduce installation costs. 【Features】 ■ Two layers of T-BAGS sandwiched with a special sheet laid beneath the floor slab and under the foundation ■ Applicable to soft ground ■ Low cost ■ Maintenance-free ■ Vibration reduction: from 300gal–800gal to below 200gal–250gal *For more details, please refer to the PDF document or feel free to contact us.

• Earthquake-resistant construction method
• Ground foundation construction method
• Ground improvement

The "TNF-D method" disperses the stress under the foundation by shaping the foundation into a trapezoidal form. It reduces stress on the underlying ground and supports the foundation with a strong TNF improved ground. By minimizing the foundation volume, it can reduce the amount of concrete, excavation, and rebar used. Additionally, it contributes to reducing environmental impact through labor-saving construction. 【Features】 ■ Reduction of foundation structure costs ■ Shortening of foundation structure construction time ■ Resolution of labor shortages ■ Reduction of environmental impact *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Ground improvement

The "TNF Method" is a low-cost special foundation construction method that integrates the slab and building foundation with improved ground using solidifying materials, supporting the building across the entire improved ground surface without the use of piles. By dispersing soil stress in multiple directions, it suppresses one-directional extrusion of the soil. It allows for construction while protecting historical heritage and other underground assets. Additionally, it significantly reduces the use of materials such as rebar, concrete, and formwork. 【Features】 ■ Suppresses differential settlement ■ No uplift steps that occur in pile-supported buildings ■ The improved ground shields against surface outflow of soil and mitigates liquefaction directly beneath the building ■ Minimal impact on underground natural environments such as groundwater ■ Protects underground buried objects ■ Reduces CO2 emissions *For more details, please refer to the PDF materials or feel free to contact us.

• Ground foundation construction method
• Ground improvement

This document introduces the Soil Environment Conservation Technology Association. It includes available technologies held by members, case studies of measures using member-held technologies, a series of environmental issues caused by contaminated soil and illegal dumping, as well as examples of disasters, waste, pollution, and land subsidence. This is an easy-to-understand document that uses many photographs. Please take a moment to read it. [Contents] ■ Greetings ■ Available technologies held by members ■ Case studies of measures using member-held technologies ■ Products held by the association ■ Association-operated site: Consultation Room for Contaminated Soil and Waste ■ <HOT TOPICS> *For more details, please refer to the PDF document or feel free to contact us.

• Ground improvement

The Yoshimitsu Group is a member company of the General Incorporated Association for Soil Environmental Conservation Technology. They possess neutralization and immobilization modifiers such as the "Metal Shut Series" and neutral modifiers like the "Hardrex Series." The association offers business services that are handled as a single team. Our services provide solutions for the proper treatment and utilization of contaminated soil and waste. [Proposal Contents] ■ Naturally occurring heavy metal unsuitable soil ■ Various types of contaminated soil from human activities (VOC, oil, heavy metals) ■ Soil mixed with waste and regeneration of final disposal sites ■ Recycling and proper treatment of waste ■ Reuse of soft soil, liquefaction prevention, special ground improvement, and fluidization treatment *For more details, please refer to the PDF materials or feel free to contact us.

• Ground improvement

"Metal Shut" is an inorganic mineral composite modifier made from raw materials such as calcium and magnesium. It has the effect of immobilizing heavy metals while also improving strength, handling (modification), and exhibiting neutralization effects. The treated soil after modification shows improvements in various physical properties. The compaction density of the soil increases, and the ground strength improves, making it reusable for backfilling and other purposes. 【Features】 ■ Immediate effects ■ Maintains effects permanently ■ Cost-effective and quick construction time ■ Effective on acidic and alkaline soils ■ Effective on complex contamination and high-concentration pollution ■ Improved ground strength *For more details, please refer to the PDF document or feel free to contact us.

• Ground improvement
• Earthworks
• Soil improvement material

"Hardrex" is an inorganic mineral composite modifier that improves handling and compaction density immediately after mixing with the target soil, due to its instant water absorption effect and the modification effects of hydration reactions and agglomeration granulation. It begins to generate a large amount of ettringite within a few hours of mixing, ensuring trafficability and initial strength through the effect of linking soil particles, making it suitable for heavy machinery operation. Furthermore, it continuously transitions into a series of chemical reactions such as pozzolanic reactions and carbonation reactions, increasing its binding strength over time, leading to long-term stability. 【Features】 ■ Immediate effect ■ Cost-effective and quick construction ■ Achieves strength even with difficult-to-stabilize soils ■ Low alkalinity, environmentally friendly ■ Resistant to disasters such as earthquakes and heavy rains ■ Improvement in trafficability *For more details, please refer to the PDF document or feel free to contact us.

• Ground improvement

"Oil Shut" is a oil purification agent primarily composed of calcium oxide. By adding and mixing it into oil-contaminated soil, it instantly removes oil films and odors from the soil, purifying it. Purification treatment can be carried out on-site without the need to remove the contaminated soil. It allows for purification treatment in a short period and is a cost-effective method that complies with the Ministry of the Environment's guidelines. [Features] ■ Instantly removes oil films and odors - immediate effect ■ Promotes self-purification through oil digestion and decomposition ■ Low cost and quick construction time ■ Effective with a small amount of use ■ Improves ground strength *For more details, please refer to the PDF document or feel free to contact us.

• Ground improvement

The construction method suppresses the uplift of manholes through two functions: ground improvement by vibration and the drainage function for excess pore water pressure relief. Without drawing in groundwater or soil, it is possible to drill from inside the manhole to the bottom of the manhole and install a filter. By vibrating the manhole body and compacting the surrounding ground, ground improvement is achieved, and even if excess pore water pressure occurs due to aftershocks, it is maintenance-free, providing peace of mind. 【Features】 ■ No excavation ■ Maintenance-free ■ Responds to aftershocks *For more details, please refer to the PDF materials or feel free to contact us.

• Civil Engineering Method

A "stockyard" is a facility that uses the liter method to recycle improved soil for reusing construction-generated soil from the site as backfill material or backfill material. Since construction-generated soil is recycled on-site, it significantly reduces disposal costs and new purchase costs. It can accommodate various types of soil, supply improved soil at a plant-level workload, eliminate mixing inconsistencies, and reduce the amount of solidifying agents. 【Benefits of Recycling Construction-Generated Soil】 ■ Prevention of environmental destruction and elimination of secondary pollution ■ Significant cost reduction made possible by on-site processing ■ High-performance soil improvement machinery ensures quality *For more details, please refer to the PDF document or feel free to contact us.

• Other resource recycling

This document provides a detailed introduction to the new technology "TNF Method" for shortening construction periods and reducing building costs. This method achieves a low-cost foundation that does not require piles. Typically, there are no underground beams, and the foundation and slab concrete are directly poured onto the improved layer shaped like a grid. We provide a detailed explanation of the "construction sequence," "cost comparisons by type of work," and "construction achievements," along with diagrams and photographs. We encourage you to read it. 【Contents】 ■ Why is foundation work necessary in construction? ■ What is the current situation regarding this? ■ What are the current issues? ■ Proposals for new construction and extensions ■ What is the TNF Method? *For more details, please refer to the PDF document or feel free to contact us.

• Ground foundation construction method

The "Litera Method" is a construction technique that uses a self-propelled soil improvement machine called "Litera" to mix soil and solidifying agents on construction sites. It can be implemented in narrow yards and has high improvement efficiency, significantly reducing the drop of untreated areas. Due to the low dust generation, it can be carried out in residential areas and alongside roads. Examples of this method's application include "safety measures for skin drop at tunnel portal heads" and "dust control" among other construction cases. 【Features】 ■ Prevention of environmental destruction and resolution of secondary pollution ■ Significant cost reduction made possible by on-site processing ■ High-quality assurance due to the use of high-performance soil improvement machines ■ Feasible construction in narrow yards ■ High improvement efficiency greatly reduces the drop of untreated areas ■ Low dust generation allows for construction in residential areas and alongside roads *For more details, please refer to the PDF materials or feel free to contact us.

• Special Construction Method