事業紹介SERVICES

SERVICES

Two Core Businesses

Protecting infrastructure, supporting a safe and secure future.

Pipeline Services

We maintain essential lifelines such as water and sewer systems,
ensuring a stable water environment.

Concrete Structure Longevity Services

Using a wide range of advanced technologies,
we extend the lifespan of aging concrete structures.

Completed Works

Fiscal Year 2020

External Sewer Rehabilitation Works near 2-chome, Shimo-Ochiai, Shinjuku-ku
Sewer Rehabilitation Works near Nakamachi, Itabashi-ku
Manhole Cover Rehabilitation Works near 4-chome, Tokiwadai, Itabashi-ku
Corrosion Protection Works for the Sludge Tank at Mikawashima Water Reclamation Center
Seismic Reinforcement Works for Discharge Channel Outlets at Nitta Pumping Station and Two Other Locations
Seismic Reinforcement Works for Discharge Channel Outlets at Mikawashima Water Reclamation Center and Aizome Pumping Station
Seismic Retrofitting Works for Pipelines near 1-chome, Shibuya, Shibuya-ku and 3-chome, Kita-Aoyama, Minato-ku
Sewer Improvement Works near 5-chome, Shinjuku, Katsushika-ku and 3-chome, Higashi-Mizumoto
Corrosion Protection Works for Inflow Channels to the Aizome Reaction Tanks at Mikawashima Water Reclamation Center
Discharge Channel Outlet Rehabilitation Works at Komatsugawa No.2 Pumping Station
Corrosion-Proof Coating and Rehabilitation Works for Manholes near 3-chome, Shinsuna, Koto-ku
Reconstruction Works (Phase 2) near 2-chome, Nagatacho, Chiyoda-ku
Current Condition Survey of the North-South Connecting Channel at Kasai Water Reclamation Center

Fiscal Year 2021

Sewer Rehabilitation Works near 3-chome, Tokumaru, Itabashi-ku
Seismic Retrofitting Works for Pipelines near 4-chome, Kami-Ikebukuro, Toshima-ku and 2-chome, Higashi-Ueno, Taito-ku
Seismic Reinforcement Works (Phase 2) for Discharge Channel Outlets at Mikawashima Water Reclamation Center and Aizome Pumping Station
Seismic Reinforcement Works for Discharge Channel Outlets at Higashi-Kanamachi Pumping Station
Manhole Cover Rehabilitation Works near 3-chome, Midori, Sumida-ku
Seismic Reinforcement Works (Phase 2) at Heiwajima Pumping Station
Corrosion Protection Works (Phase 3) for Rainwater Storage Channel at Shibaura Water Reclamation Center
Branch Pipeline Works near 2-chome, Senju, Adachi-ku and 1-chome, Odai
Corrosion-Proof Coating Works for Manholes near 3-chome, Shoan, Suginami-ku
Seismic Retrofitting Works for Pipelines near 1- and 4-chome, Ariake, Koto-ku
Seismic Reinforcement Works for Wastewater Treatment Facilities, FY2021 (Phase I, Part 2)
Corrosion Protection Works for Primary Sedimentation Tank (East) at Morigasaki Water Reclamation Center
Building Improvement Works in Conjunction with Route 4 Road Development at Shibaura Water Reclamation Center

Fiscal Year 2022

Corrosion Protection Works for Primary Sedimentation Tank No.2 (West Line) at Shibaura Water Reclamation Center
Construction Works Associated with Equipment Reconstruction at Rokugo Pumping Station
Seismic Reinforcement Works for Discharge Channel Outlets at Kamiya Pumping Station
Special Manhole Rehabilitation Works near 4-chome, Nishidai, Itabashi-ku
Seismic Reinforcement Works (Phase 3) at Heiwajima Pumping Station
Manhole Cover Rehabilitation Works within Nerima Branch Office Jurisdiction
Corrosion-Proof Coating and Rehabilitation Works for Manholes within Taito Branch Office Jurisdiction
Seismic Reinforcement Works for Wastewater Treatment Facilities, FY2022 (Phase I, Part 3)
Seismic Retrofitting Works for Pipelines near Kamiyama-cho, Shibuya and 1-chome, Shoto (Phase 2)
Corrosion Protection Works for the Water Treatment Facility of Tamagawa Upper Stream Water Reclamation Center
Seismic Reinforcement Works at Rokugo Pumping Station

Fiscal Year 2023

Construction Works (Phase 3) Associated with Grit Chamber Installation at Shibaura Pumping Station, Adjacent to Shibaura Water Reclamation Center
Seismic Reinforcement Works for Discharge Channel Outlets at Komatsugawa Pumping Station
Confluence Improvement Facility Works in the Nihonbashi River Basin near 2-chome, Otemachi, Chiyoda-ku
Removal Works of Temporary Storage Facility along Yahiro Trunk Line
Construction Works for Seismic Reinforcement and Equipment Reconstruction at Water Treatment Facility, Minami-Tama Water Reclamation Center
Seismic Retrofitting Works for Pipelines near 2- and 3-chome, Kaigan, Minato-ku
Seismic Reinforcement Works for Wastewater Treatment Facilities, FY2023 (Phase II, Part 2)
Branch Pipeline Works near 4-chome, Minami-Suna, Koto-ku

Fiscal Year 2024

Seismic Retrofitting Works for Pipelines near 3-chome, Kitami and 3-chome, Nozawa, Setagaya-ku
Seismic Retrofitting Works near 1-chome, Chuo and 4-chome, Haneda, Ota-ku
Seismic Reinforcement Works at Yugi No.2 Sewage Relay Pumping Station, Ome Sewerage System
Seismic Reinforcement Works for Discharge Channel Outlet at Honda Pumping Station
Seismic Retrofitting Works for Pipelines near 1-chome, Hanakawado, Taito-ku and 1-chome, Kami-Ikebukuro, Toshima-ku
Corrosion Protection Works for Inflow Channels to Primary Sedimentation Tank (Asakusa Line) at Mikawashima Water Reclamation Center
Construction and Seismic Reinforcement Works Associated with Sludge Digester Equipment Reconstruction (East) at Morigasaki Water Reclamation Center
Seismic Retrofitting Works for Pipelines near 6-chome, Ueno, Taito-ku and Kanda-Matsunaga-cho, Chiyoda-ku
Corrosion Protection Works for Primary Sedimentation Tank (West Line) and One Other Location at Shibaura Water Reclamation Center

Our Credentials

Highlighting our trust and achievements through memberships, certifications, and patents.

Affiliations

Japan Federation of Small and Medium-Sized Construction Enterprises ((一社)全国中小建設業協会)

Tokyo Federation of Small and Medium-Sized Construction Enterprises ((一社)東京都中小建設業協会)

Tokyo Sewerage Specialist Association ((一社)東京都下水道専業者協会)

Tokyo Plumbing and Piping Contractors Cooperative Association (東京都管工事工業協同組合)

Japan Concrete Protection Association ((一社)日本コンクリート防食協会)

Tokyo Sewerage Maintenance Cooperative Association (東京都下水道メンテナンス協同組合)

Tokyo Chamber of Commerce and Industry

Japan Construction Occupational Safety and Health Association(建設業労働災害防止協会)

Japan Painting Contractors Association((一社)日本塗装工業会)

Tokyo Painting Contractors Cooperative Association(東京都塗装工業協同組合)

Affiliated Construction Methods

National Slanted SS Method Association (全国斜式SS工法協会)

Existing Pipeline Seismic Retrofit Association (既設管路耐震化協会)

Ecolo Guard Method Association (エコロガード工法協会)

Hydrogrout Method Association (ハイドログラウト工法協会)

TACCS Method Association (TACCS工法協会)

VandexFlexin Industry Association (バンデックス止水工業会)

STTG Method Association (STTG工法協会)

Certifications & Registrations

Omotenashi Standard Certification

Security Measures Self-Declaration (セキュリティ対策自己宣言)

Eco Action 21

Work Style Reform Declaration Company (働き方改革宣言企業)

Health Company Declaration (健康企業宣言)

Econetwork eana (エコネットワークｅａｎａ)

Certified Excellent Health Company (健康優良企業認定)

Academic & Patent Information

Published in MDPI Journals

Japan Society of Civil Engineers (JSCE):Geotechnical Study on Reducing Environmental Load during Wastewater Treatment from Asphalt Pavement Cutting (アスファルト舗装切断汚水処理時の環境負荷低減に関する地盤工学的検討)

Patent No. 4956512: Anti-Protrusion and Anti-Floating Structure for Manholes (マンホールの突き出し及び浮上の防止構造)

Patent No. 5139377: Anti-Floating Structure for Manholes (マンホールの浮上防止構造)

Patent Application No. 2012-219582: Odor-Control Invert Manhole and Sewage Basin (防臭式インバートのマンホール及び汚水桝)

Patent No. 5514846: Simple Cover Plate (簡易覆工板)

Patent No. 6175124: Buried Object Position Indicating Member (埋設物位置表示部材)

Patent Application No. 2017-217593: Method and Device for Treating Pavement Road Cutting Water (舗装道路切断水の処理方法及び処理装置)

Others

Certified by Kanto Bureau of Economy, Trade and Industry: Urban-Type Anti-Floating Manhole Technology (都市部対応型マンホール浮上防止技術)

Awards and Recognition

Certificate of Appreciation – Excellent Construction Work
Date of Award: February 20, 2025
Issuer：Tokyo Urban Planning and Development Corporation
Recipient：Toshin Industry Co., Ltd.
Award for Excellent Construction Safety and Health Management
Date of Award: October 31, 2023
Issuer：Bureau of Sewerage, Tokyo Metropolitan Government
Recipient：Yusuke Koda
Award for Excellent Construction Safety and Health Management
Date of Award: October 31, 2023
Issuer：Bureau of Sewerage, Tokyo Metropolitan Government
Recipient：Ryuhei Sakamoto
Certificate of Appreciation - Long-term Contribution to Regional Environmental Conservation
Issuer：Institute for Promoting Sustainable Societies (IPSuS), Central Secretariat for Eco Action 21
Recipient：Toshin Industry Co., Ltd.
Certificate of Appreciation - Monetary Donation
Issuer：Japanese Red Cross Society, Tokyo Branch
Recipient：Toshin Industry Co., Ltd.
Certificate of Appreciation — Contribution to the Advancement of Social Welfare
Issuer：Tokyo Metropolitan Council of Social Welfare (Social Welfare Corporation)
Recipient：Toshin Industry Co., Ltd.
Certificate of Appreciation - Lecturer at Management Training Seminar
Issuer：Tokyo Association of Small and Medium-Sized Construction Companies
Recipient：Hirohisa Yamaguchi
Certificate of Appreciation - Noto Peninsula Earthquake Disaster Recovery Support Team
Issuer：Sewerage Maintenance Cooperative
Recipient：Toshin Industry Co., Ltd.
Certificate of Appreciation — Great East Japan Earthquake Disaster Recovery Support Team
Issuer：Sewerage Maintenance Cooperative
Recipient：Toshin Industry Co., Ltd.
Long-term Service Award
Issuer：Tokyo Association of Small and Medium-Sized Construction Companies
Recipient：Toshin Industry Co., Ltd.
Certificate of Appreciation - Excellent Construction Award, Five Consecutive Years
Issuer：Bureau of Sewerage, Tokyo Metropolitan Government
Recipient：Toshin Industry Co., Ltd.
Order of the Blue Ribbon - Fiscal Years 2022, 2023, 2024
Issuer：Emperor of Japan
Recipient：Toshin Industry Co., Ltd.
Membership Certificate
Issuer：Japan Guide Dog Association
Recipient：Toshin Industry Co., Ltd.
Award for Excellent Construction Safety and Health Management
Issuer：Bureau of Sewerage, Tokyo Metropolitan Government
Recipient：Shuhei Marume