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  3. メインマーク 【全国対応】/東京・大阪・札幌・仙台・新潟・金沢・名古屋・福岡
Building materials, supplies and fixtures
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メインマーク 【全国対応】/東京・大阪・札幌・仙台・新潟・金沢・名古屋・福岡

EstablishmentJuly 2001
capital2000Ten thousand
number of employees100
addressTokyo/Edogawa-ku/5-2-3 Nishikasai, NEXTAGE Nishikasai 7th floor
phone03-5878-9101
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last updated:May 12, 2025
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  • Products/Services(52)
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メインマーク Company Profile

We create reliable technology with forward-thinking ideas, addressing structural inclinations of buildings and the challenges of the underlying ground while maintaining our customers' operations, thereby protecting lives and businesses.

The main business activities of Mainmark involve "returning tilted floors and buildings to a level state" and "preventing existing floors and buildings from tilting." We primarily offer the "TerraTech Method," which allows us to level tilted floors without stopping operations, and we provide various construction proposals tailored to our customers' concerns, from investigation to execution. ■ Nationwide responsible construction with over 5,000 completed projects Mainmark has established offices in eight locations across the country and conducts responsible construction nationwide. We serve a wide range of clients, including factories, stores, warehouses, offices, and apartments. ■ Non-disruptive floor tilt and subsidence correction method "TerraTech Method" Our main service, the "TerraTech Method," is a patented technique that injects TerraTech resin (rigid polyurethane foam resin) into concrete floors that have developed tilts, subsidence, steps, or voids due to ground subsidence or earthquakes. The expansion force of the resin levels the sunken floor and fills the voids beneath it. This technology is also registered with the Ministry of Land, Infrastructure, Transport and Tourism's "NETIS," ensuring its reliability. Patent No. 4896949 "Method for Correcting Sunken Floors" NETIS Registration No. "QS-080007"

Business Activities

Our company has a team of experts, including first-class architects, specializing in architecture, civil engineering, ground conditions, liquefaction, and structural vibrations. Based on the condition of buildings and ground, as well as the concerns of our clients, we provide optimal proposals from a wide range of construction methods and services. ■ Products and Services ■ Floor subsidence measures / Hollow space measures under floors: Teratech method / Terafil method Building tilt measures: JOG method / Pressure-resistant slab method / Underpinning method / Helical pier method Subsidence prevention measures: High-pressure injection mixing method / GSIS method / Deep injection method Liquefaction measures / Landslide measures for embankments: Non-excavation groundwater lowering method (collection and drainage pipe MPD pipe) Vibration investigation / analysis / consulting for buildings: log365 ■ Business Activities ■ Correction of tilt in concrete floor slabs / Leveling work Filling work for hollow spaces under concrete floor slabs, etc. Pest control work for factories / warehouses Correction work for tilt in existing buildings Ground improvement / reinforcement work under existing buildings Subsidence prevention work through filling underground cavities Liquefaction measures / Landslide prevention work for embankment construction sites Vibration investigation / analysis / consulting for buildings Exporting Japan's earthquake resistance technology and ground improvement technology overseas.

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Products/Services (52)

Achieve a "smooth floor" in an auto repair shop in just one day! Measures against floor sinking and unevenness. product image
Achieve a "smooth floor" in an auto repair shop in just one day! Measures against floor sinking and unevenness.
[Ground Improvement] "Permeation Solidification Injection Method" Ground improvement under buildings. product image
[Ground Improvement] "Permeation Solidification Injection Method" Ground improvement under buildings.
Polyurethane injection "Teratec method" for addressing floor tilt, subsidence, step differences, and voids. product image
Polyurethane injection "Teratec method" for addressing floor tilt, subsidence, step differences, and voids.
Numerous achievements in public works! Settlement floor correction method 'Teratec Method' product image
Numerous achievements in public works! Settlement floor correction method 'Teratec Method'

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catalog(28)

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Monitoring the structural integrity of buildings 365 days a year using fine vibration data [log365 Building Structure Monitoring]

Monitoring the structural integrity of buildings 365 days a year using fine vibration data [log365 Building Structure Monitoring]

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Teratech Construction Method - Case Study Collection

Teratech Construction Method - Case Study Collection

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Inside sales implementation support service specialized for manufacturing and construction industries [Urettech InsideON]

Inside sales implementation support service specialized for manufacturing and construction industries [Urettech InsideON]

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Floor subsidence correction, void filling under the floor, and building tilt correction work in Asian countries.

Floor subsidence correction, void filling under the floor, and building tilt correction work in Asian countries.

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news(31)

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Announcement of participation in "MF-TOKYO 2025" to be held in Tokyo in July 2025.

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The exhibition at "MF-TOKYO 2025," which will be held from July 16 (Wednesday) to July 19 (Saturday), 2025, at Tokyo Big Sight, has been confirmed! "MF-TOKYO 2025" is an international exhibition related to forming machinery (presses, sheet metal, forming, automation, and peripheral equipment). Mainmark will be exhibiting for the first time, showcasing safety measures such as floor void filling for heavy machinery and equipment like presses, as well as the "TerraTech Method," which contributes to productivity improvement and prevention of labor accidents by correcting factory floor inclinations. We look forward to welcoming everyone visiting the Ipros manufacturing site. *For more details, please see the announcement below: https://mainmark.co.jp/news/20250529

May 29, 2025

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Announcement of Participation in "Western Japan Manufacturing Technology Innovation 2025" to be Held in Kokura, Fukuoka in July 2025.

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The exhibition "Nihon Manufacturing Technology Innovation 2025," which will be held from July 2 (Wednesday) to July 4 (Friday), 2025, at the West Japan General Exhibition Center, has been confirmed! At "Nihon Manufacturing Technology Innovation 2025," cutting-edge technologies that address various challenges faced by manufacturing sites in the Kyushu and Yamaguchi regions, centered around Kitakyushu, will be showcased. Mainmark will be exhibiting for the first time, introducing the "TerraTech Method," which contributes to safety measures by filling the voids under floors where machinery and equipment are installed, and improving productivity and preventing workplace accidents by correcting floor inclinations. We look forward to welcoming everyone visiting the Ipros manufacturing site. *For more details, please see the announcement below: https://mainmark.co.jp/news/20250522

May 29, 2025

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We have published examples of the construction work for the sinking correction project.

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We have newly published a case study on our service site for the Teratec method. This is a case of settlement correction work carried out at an electronics retail store in Shiga Prefecture. There were concerns about the sagging of the store floor due to ground subsidence, and we were consulted by the company. We understand that our Teratec method was chosen because it allows for construction without interrupting daily operations. Additionally, the positive feedback from a previous project was also a key point. Our company has extensive experience in settlement measures and void filling work while maintaining daily operations for stores and factories. With eight offices nationwide, we are ready to assist you, so please feel free to contact us if you are facing issues with ground subsidence or voids under your floors. ■ Case Study (Teratec Method Service Site): https://teretek.jp/repo/r181

May 20, 2025

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Company name メインマーク 【全国対応】/東京・大阪・札幌・仙台・新潟・金沢・名古屋・福岡
number of employees100
Contact addresspostalcode 134-0088 Tokyo/ Edogawa-ku/ 5-2-3 Nishikasai, NEXTAGE Nishikasai 7th floorView on map TEL:03-5878-9101 FAX:03-5878-9102
Key PartnersMain Clients Obayashi Corporation Kajima Corporation Taisei Corporation Takenaka Corporation Shimizu Corporation Daiwa House Industry Co., Ltd. TODA Corporation Mitsui Sumitomo Construction Co., Ltd. Ando Corporation Tokyu Construction Co., Ltd. Goyo Construction Co., Ltd. Maeda Corporation Fujita Corporation Nishimatsu Construction Co., Ltd. NIPPO Corporation [Government Agencies] Kanto Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism Chubu Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism Kinki Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism Chugoku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism Kyushu Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism Hokuriku Regional Development Bureau, Ministry of Land, Infrastructure, Transport and Tourism Tokyo Aviation Bureau, Ministry of Land, Infrastructure, Transport and Tourism Tokyo Metropolitan Government, First Construction Office Iwate Prefecture, Prefectural Land Development Department Aomori Prefecture, Shimokita Regional Bureau Kyoto Prefecture, Civil Engineering Office Chiba Prefecture, Sewerage Public Corporation
Business LocationsClick here for the list
Industry Building materials, supplies and fixtures
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