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  1. Home
  2. Architectural design office
  3. 在住ビジネス 本社
Architectural design office
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在住ビジネス 本社

EstablishmentJune 1, 2012
capital5000Ten thousand
number of employees46
addressTokyo/Minato-ku/3rd Floor, PMO Tamachi IV, 5-29-19 Shiba
phone03-5439-5254
  • Official site
last updated:Oct 10, 2025
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  • Products/Services(10)
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在住ビジネス Company Profile

There are professionals who support the experts in the housing business! A solution partner for home building.

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.

Business Activities

Provision of ground-related services (ground surveys / ground reinforcement work / ground compensation / subsidence correction work / improvement pile extraction work) Provision of site investigation services (current condition surveys / government office investigations) Housing-related services (energy-saving calculations / BELS applications / wallstat input and verification agency / structural calculations / other design assistance) Housing-related compensation system Provision of asbestos pre-investigation services Planning / development / system design / system operation of damage insurance services General agency work for damage insurance

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Products/Services (10)

Wallstat verification + earthquake reconstruction guarantee product image
Wallstat verification + earthquake reconstruction guarantee
3D measurement (3D site survey) product image
3D measurement (3D site survey)
Residential Equipment Warranty product image
Residential Equipment Warranty
Ground investigation / reinforcement work / ground warranty product image
Ground investigation / reinforcement work / ground warranty

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catalog(10)

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

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

COMPANY
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Surface ground reinforcement (shallow mixing treatment method)

Surface ground reinforcement (shallow mixing treatment method)

OTHER
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Columnar ground improvement (deep mixing method)

Columnar ground improvement (deep mixing method)

OTHER
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Small-diameter steel pipe rotary insertion method (using small-diameter steel pipes for pile-type ground reinforcement)

Small-diameter steel pipe rotary insertion method (using small-diameter steel pipes for pile-type ground reinforcement)

OTHER
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news(14)

Notice of Renewal of the "Company Profile Catalog"

  • CATALOG

We sincerely thank you for your exceptional support. Starting in 2024, we will be providing services under the "Ken Support" series, and thanks to your support, we have been expanding our services year by year. We have added information about our newly launched "3D Surveying" and "Earthquake Reconstruction Guarantee," and we have renewed our company brochure. Our corporate concept is based on the phrase "There are professionals who support professionals." In order to support the designers, who are "professionals in residential design," we will continue to aim for improved quality and expansion of services as "professionals in specialized fields." We will sincerely address the changing concerns of the times and strive to support designers across the country.

Oct 10, 2025

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zaijubiz_official_qr.png

Announcement of the opening of the official Instagram account.

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Thank you very much for your continued support. We are pleased to announce that Zaiju Business Co., Ltd. has launched an official Instagram account. On Instagram, we will share useful information about the construction industry and details about our services, aiming to reach a wider audience. We would be grateful if you could take a look and follow us. Official Instagram Account → @zaijubiz_official URL: https://www.instagram.com/zaijubiz_official We appreciate your continued support in the future.

Aug 01, 2025

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[Online Seminar] Scheduled for July 25, 2025! Announcement of the webinar for builders on "NODA x CST x Resident Business."

  • OTHER

We are pleased to announce that we will be holding a collaborative seminar with Noda Corporation and Computer System Research Institute, Inc. This seminar will focus on "standardization" driven by legal reforms, promoting the standardization of design and DX in design operations, and "planning" for sellable housing products through differentiation strategies unique to each company. ◎ Seminar Content Part 1: New Era of Planning in the Housing Industry - Standardization and Differentiation Strategies Prompted by Legal Reforms (ThinkPass Inc.) Part 2: Planning for Seismic Products - Proposals for Seismic Performance of HBW Minimal Walls (Noda Corporation) Part 3: Efficiency in Planning Setup & Calculation Operations with ALTA+KIZUKURI (Computer System Research Institute, Inc.) Part 4: Visualizing New Standards for Seismic Performance Using wallstat (Zairyu Business Inc.) ◎ Event Overview Date and Time: July 25, 2025 (Friday) 16:00 - 17:30 Format: Online (Zoom) Participation Fee: Free Capacity: 500 people (First-come, first-served; up to 3 participants per company) Please apply through the related link.

Jun 16, 2025

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Detailed information

Company name 在住ビジネス 本社
number of employees46
Contact addresspostalcode 108-0014 Tokyo/ Minato-ku/ 3rd Floor, PMO Tamachi IV, 5-29-19 ShibaView on map TEL:03-5439-5254 FAX:03-3457-3131
Industry Architectural design office
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