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  1. Home
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  3. Construction, work and methods
  4. Civil Engineering
  5. Site and ground investigation
  6. Ground investigation / reinforcement work / ground warranty

Ground investigation / reinforcement work / ground warranty

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last updated:Jun 08, 2026

在住ビジネス 本社
在住ビジネス 本社
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A team of experienced ground professionals provides total support from the designer's perspective.

The ground business services of Inhabitant Business provide a one-stop solution from investigation to construction and warranty. We conduct ground surveys, analyze and determine results, prepare construction estimates, and then provide reinforcement work to the client. We also offer ground warranty as aftercare. We respond through a network of 74 ground companies nationwide. The ground assessments from partner companies are double-checked by ground engineers from Inhabitant Business (automatically providing a second opinion). Additionally, ground warranty is automatically included. There are no exemptions due to slope angles, and we also address ground accidents caused by retaining walls; it is applicable to non-residential properties as well. This is a top-class ground warranty in the industry.

    Site and ground investigation
スクリーンショット

Ground investigation / reinforcement work / ground warranty

スクリーンショット 2024-08-27 100403.png
スクリーンショット 2024-08-27 100403.png
  • Related Link - https://zaijubiz.jp/service/j-optimize/

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basic information

There are five key points to the residential business's ground investigation service. 1. Nationwide Speed Response …74 companies nationwide, with approximately 220 locations, are available to assist, including investigations in mountainous areas and remote islands. Adjustments can be made for the shortest investigation schedule. 2. Optimization of Improvement Rates …The investigation results and judgments are double-checked by ground engineers of the residential business. We support appropriate judgments regarding the ground. *Residential Ground Engineer / Chief Residential Ground Engineer 3. Multiple Estimates …If it is determined that improvement is necessary, ground engineers will select appropriate construction methods and obtain multiple estimates from different companies. 4. Support for Narrow Sites and Retaining Wall Locations …We carry out safe construction at challenging sites, such as narrow plots and those with retaining walls, using appropriate methods. 5. Industry-Leading Warranty …The ground warranty from the residential business comes with a reassuring 20-year guarantee. It can also address differential settlement caused by retaining walls, with no exclusions for slope angles. Non-residential properties are also covered.

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Applications/Examples of results

The methods for ground reinforcement construction are compatible with various techniques as shown in the diagram.

Detailed information

  • kouhou_img5-1536x898.jpg

    This is an example of ground reinforcement construction methods.

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Zainyu Business Co., Ltd. Company Information / Business Introduction

Zainyu Business Co., Ltd. Company Information / Business Introduction

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I have started a column page.

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We have started a column page aimed at those in the construction industry focused on wooden houses, as well as homeowners considering building new homes. We plan to update it regularly, so we would appreciate it if you could check back often.

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We will be exhibiting at the Tohoku Japan Building Materials Fair 2024.

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We will be exhibiting at the Tohoku Japan Building Materials Fair 2024, which will be held on Thursday, June 13, 2024, at Yume Messe Miyagi (Sendai City, Miyagi Prefecture). Details are as follows: Venue: Yume Messe Miyagi Main Hall Exhibition Area ABC Time: 9:30 AM - 4:00 PM Exhibition Space: "Comfortable Living" Support Center Area Access: https://www.yumemesse.or.jp/access/

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Company information

在住ビジネス

在住ビジネス 本社

Architectural design office

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Zainju Business Co., Ltd. is developing various businesses to support housing developers. We have established a range of support systems, including structural design consulting, site surveys + government office investigations, ground service projects, and housing-related services.

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