CO2-Reducing, Labor-Saving Concrete "High-producrete" First Applied in Actual Construction Project!
Tokyu Corporation, Tokyu Construction, and Tokyo University of Science have jointly developed "High-producrete," a next-generation concrete that reduces CO2 emissions and labor. It has been successfully applied for the first time in an actual construction project for the elevated railway maintenance between Hiyoshi and Tsunashima Stations on the Tokyu Toyoko Line, demonstrating a 66% reduction in CO2 emissions and approximately 60% reduction in construction time.
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- 📰 Published: March 31, 2026 at 19:00
- 🔍 Collected: April 1, 2026 at 13:39 (18h 39m after Published)
- 🤖 AI Analyzed: April 22, 2026 at 01:47 (492h 7m after Collected)
Tokyu Corporation (hereinafter, Tokyu Corp.), Tokyu Construction Co., Ltd. (hereinafter, Tokyu Construction), and Tokyo University of Science have for the first time applied "High-producrete" (trademark registration No. 6956697), a next-generation concrete developed through extensive research to reduce CO2 emissions and streamline construction as part of the GX (Green Transformation) *1 of railway construction, to an actual construction project: the elevated railway maintenance work between Hiyoshi Station and Tsunashima Station on the Tokyu Toyoko Line (hereinafter, this project), which commenced on January 7, 2026 (Wednesday).
"High-producrete" is a general term for concrete that can achieve improved productivity. It was jointly developed by Tokyo University of Science (applicant: Professor Yoshitaka Kato) and Tokyu Construction, utilizing the "Matching with Universities and Research Institutions" system *2 implemented by the Kanto Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism. The type applied in this project reduces CO2 emissions by replacing most of the Portland cement, the main source of CO2 emissions in concrete, with admixtures made from resource-recycling materials such as by-products and recycled materials. Furthermore, by increasing fluidity compared to conventional slump-managed concrete, it enables rationalization and labor-saving in construction. As a result of further research into concrete mix design, it has become possible to select mixes that meet fresh concrete quality standards with less labor and resources, thereby achieving rationalization in mix design as well.
In this project, High-producrete was applied to the paving under the elevated railway. As a result, it successfully reduced CO2 emissions from concrete work by 66% compared to standard ordinary cement, confirming its effectiveness in contributing to Japan's greenhouse gas emission reduction target of 60% by FY2035 *3. Construction time was also reduced by approximately 60% compared to conventional methods. This demonstrated that "High-producrete" can achieve both CO2 emission reduction and labor-saving in construction even when applied to structures different from the research and development stage. In addition to decarbonization and energy-saving effects, reducing the operating time of generators used during construction also shortens the duration of noise and vibration, thereby helping to preserve the living environment of nearby residents.
Tokyu Corporation is promoting GX in railway construction based on its environmental vision 2040, formulated by Tokyu Corporation, aiming to realize a decarbonized society through technological innovation, energy saving through individual actions, and the utilization and generation of renewable energy. Tokyu Construction, in its long-term management plan reaching FY2030, has set three core values—"decarbonization," "zero waste," and "disaster prevention/mitigation"—as strategic pillars, and is advancing the on-site application of "High-producrete" technology, which contributes to decarbonization and productivity improvement at construction sites.
Going forward, Tokyu Corporation and Tokyu Construction plan to investigate the CO2 absorption amount of the "High-producrete" applied this time in actual environments and calculate the CO2 balance throughout its lifecycle. Both companies will continue to promote GX in railway construction by advancing the decarbonization of construction materials like concrete, as well as construction machinery and fuels.
*1 An initiative aiming to simultaneously achieve stable energy supply, economic growth, and emission reduction, in order to transform the fossil fuel-centric economy, society, and industrial structure since the Industrial Revolution into one centered on clean energy.
*2 A grant system for "Technology (Seeds) Matching" implemented by the Kanto Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism to promote "i-Construction," which aims to improve productivity at construction sites. Its purpose is to promote the on-site utilization of new technologies and accelerate technology research and development through industry-academia-government collaboration by matching publicly solicited new technologies (seeds) with issues (needs) to be solved on site.
*3 Japan's greenhouse gas reduction targets: Greenhouse gas reduction targets submitted to the UNFCCC Secretariat as "Japan's NDC (Nationally Determined Contribution)." It aims to reduce emissions by 46% by FY2030, 60% by FY2035, and 73% by FY2040, based on FY2013 levels.
"High-producrete" is a general term for concrete that can achieve improved productivity. It was jointly developed by Tokyo University of Science (applicant: Professor Yoshitaka Kato) and Tokyu Construction, utilizing the "Matching with Universities and Research Institutions" system *2 implemented by the Kanto Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism. The type applied in this project reduces CO2 emissions by replacing most of the Portland cement, the main source of CO2 emissions in concrete, with admixtures made from resource-recycling materials such as by-products and recycled materials. Furthermore, by increasing fluidity compared to conventional slump-managed concrete, it enables rationalization and labor-saving in construction. As a result of further research into concrete mix design, it has become possible to select mixes that meet fresh concrete quality standards with less labor and resources, thereby achieving rationalization in mix design as well.
In this project, High-producrete was applied to the paving under the elevated railway. As a result, it successfully reduced CO2 emissions from concrete work by 66% compared to standard ordinary cement, confirming its effectiveness in contributing to Japan's greenhouse gas emission reduction target of 60% by FY2035 *3. Construction time was also reduced by approximately 60% compared to conventional methods. This demonstrated that "High-producrete" can achieve both CO2 emission reduction and labor-saving in construction even when applied to structures different from the research and development stage. In addition to decarbonization and energy-saving effects, reducing the operating time of generators used during construction also shortens the duration of noise and vibration, thereby helping to preserve the living environment of nearby residents.
Tokyu Corporation is promoting GX in railway construction based on its environmental vision 2040, formulated by Tokyu Corporation, aiming to realize a decarbonized society through technological innovation, energy saving through individual actions, and the utilization and generation of renewable energy. Tokyu Construction, in its long-term management plan reaching FY2030, has set three core values—"decarbonization," "zero waste," and "disaster prevention/mitigation"—as strategic pillars, and is advancing the on-site application of "High-producrete" technology, which contributes to decarbonization and productivity improvement at construction sites.
Going forward, Tokyu Corporation and Tokyu Construction plan to investigate the CO2 absorption amount of the "High-producrete" applied this time in actual environments and calculate the CO2 balance throughout its lifecycle. Both companies will continue to promote GX in railway construction by advancing the decarbonization of construction materials like concrete, as well as construction machinery and fuels.
*1 An initiative aiming to simultaneously achieve stable energy supply, economic growth, and emission reduction, in order to transform the fossil fuel-centric economy, society, and industrial structure since the Industrial Revolution into one centered on clean energy.
*2 A grant system for "Technology (Seeds) Matching" implemented by the Kanto Regional Development Bureau of the Ministry of Land, Infrastructure, Transport and Tourism to promote "i-Construction," which aims to improve productivity at construction sites. Its purpose is to promote the on-site utilization of new technologies and accelerate technology research and development through industry-academia-government collaboration by matching publicly solicited new technologies (seeds) with issues (needs) to be solved on site.
*3 Japan's greenhouse gas reduction targets: Greenhouse gas reduction targets submitted to the UNFCCC Secretariat as "Japan's NDC (Nationally Determined Contribution)." It aims to reduce emissions by 46% by FY2030, 60% by FY2035, and 73% by FY2040, based on FY2013 levels.