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  1. Home
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  3. Construction, work and methods
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  5. Special Construction Method
  6. Significant Cost Reduction: Recycling Soil on Construction Sites with the 'Litera Method'

Significant Cost Reduction: Recycling Soil on Construction Sites with the 'Litera Method'

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last updated:Dec 15, 2025

吉光組
吉光組
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High-quality improved soil without mixing unevenness! A construction method adopted for improvement work in narrow construction yards!

The "Litera Method" is a construction technique that uses a self-propelled soil improvement machine called "Litera" to mix soil and solidifying agents on construction sites. It can be implemented in narrow yards and has high improvement efficiency, significantly reducing the drop of untreated areas. Due to the low dust generation, it can be carried out in residential areas and alongside roads. Examples of this method's application include "safety measures for skin drop at tunnel portal heads" and "dust control" among other construction cases. 【Features】 ■ Prevention of environmental destruction and resolution of secondary pollution ■ Significant cost reduction made possible by on-site processing ■ High-quality assurance due to the use of high-performance soil improvement machines ■ Feasible construction in narrow yards ■ High improvement efficiency greatly reduces the drop of untreated areas ■ Low dust generation allows for construction in residential areas and alongside roads *For more details, please refer to the PDF materials or feel free to contact us.

    Special Construction Method
IPROS51996939668382321118.jpeg

Significant Cost Reduction: Recycling Soil on Construction Sites with the 'Litera Method'

IPROS51996939668382321118.jpeg
IPROS51996939668382321118.jpeg
  • Related Link - https://www.yoshimitsugumi.co.jp/service/ritera/
  • Special site - Product/service details - https://pr.www.ipros.com/yoshimitsugumi/product/

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basic information

【Other Features】 - Prevents illegal dumping of surplus soil and environmental destruction from new material extraction. - Reduces the amount of surplus soil generated, thereby eliminating traffic pollution issues such as noise and congestion caused by transport vehicles. - Recycles construction-generated soil on-site, significantly reducing disposal and new purchase costs. - Allows for flexible adjustment of the amount of solidifying agent added, achieving improved strength similar to conventional methods with a smaller quantity of additives. - No mixing inconsistencies, enabling a reduction in the amount of solidifying agent used. - Capable of handling various types of soil, supplying improved soil with a workload comparable to that of a plant. *For more details, please refer to the PDF document or feel free to contact us.

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Applications/Examples of results

【Examples of Adoption】 ■ Improvement work for a narrow construction yard at a slope collapse site ■ Safety measures for surface erosion at tunnel portal heads ■ Dust control measures *For more details, please refer to the PDF document or feel free to contact us.

Detailed information

  • 中島01.jpg

    The state of disaster recovery work in the Noto earthquake.

  • 1486143_610823899029448_1597211261425459570_o.jpg

    The situation of contaminated soil remediation work in Shanghai, China.

  • IMG_3317.JPG

    Construction images from the New Tomei Expressway.

  • IMG_5512.JPG

    The simultaneous mixing of three types: "Sand A," "Sand B," and "Binder" for ground maintenance.

  • 液体添加装置02.JPG

    Liquid dispensing device

  • IPROS97967274623512602973.png

    Difference before and after processing

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Construction Excavated Soil Recycling System

Construction Excavated Soil Recycling System

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The Noto Reconstruction Office of the Ministry of Land, Infrastructure, Transport and Tourism has featured our 3D printer in the Nikkei newspaper.

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The official X account of the Noto Reconstruction Office of the Ministry of Land, Infrastructure, Transport and Tourism and the Nihon Keizai Shimbun have published that our 3D printer has been adopted for the reconstruction of Noto. The official X account of the Noto Reconstruction Office introduces the use of our products in the restoration work of the Noto Expressway. Additionally, the Nihon Keizai Shimbun mentions that structures made with our products are being used for the restoration of roads damaged by the Noto Peninsula earthquake, and that the construction period can be shortened by about two weeks, so please take a look.

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It was broadcast on NHK WORLD.

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The Noto reconstruction project by the Kashima, Yoshimitsu, and Noto region maintenance-type construction joint venture was featured on NHK WORLD, stating that it is being constructed using a 3D printer, and it was broadcast on November 14. It can be viewed in 150 countries around the world.

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We held a site tour.

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At the site of the "R6 Komatsu Yobama Construction," we held a site tour for four days starting from November 24. Visitors were able to observe the automation and remote operation of construction machinery. The event was also featured in the Construction Industry Newspaper and the Construction Communication Newspaper.

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It was awarded as an excellent construction project by Nomi City.

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On November 21, at the Nomi City Hall, our company was awarded for the "Yuno Children's Garden Development Project (Civil Engineering)" as an excellent construction project at the Nomi City Construction Project Awards Ceremony. For more details, please refer to the related link.

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Company information

吉光組

吉光組

General contractors and subcontractors

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We have been in the construction business for over 100 years, based in Ishikawa Prefecture.

Product/Service List (30)

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