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  3. Construction, work and methods
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  5. Special Construction Method
  6. Self-propelled soil improvement machine "Litera Method" [Construction-generated soil & CO2 reduction]

Self-propelled soil improvement machine "Litera Method" [Construction-generated soil & CO2 reduction]

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last updated:Dec 15, 2025

吉光組
吉光組
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Reducing CO2 by recycling soil at construction sites. Turning construction waste soil into high-quality improved soil.

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 also be carried out in residential areas and alongside roads. Examples of this method's application include "safety measures for tunnel entrance skin collapse" and "dust control" construction cases. 【Features】 ■ Prevention of environmental destruction and elimination of secondary pollution ■ Significant cost reduction made possible by on-site processing ■ High-quality assured due to the use of high-performance soil improvement machinery ■ Feasible in narrow yards ■ High improvement efficiency greatly reduces the drop of untreated areas ■ Low dust generation allows for implementation in residential areas and alongside roads *For more details, please refer to the PDF materials or feel free to contact us.

    Special Construction Method
リテラ工法2(イプロス).jpeg

Self-propelled soil improvement machine "Litera Method" [Construction-generated soil & CO2 reduction]

リテラ工法2(イプロス).jpeg
リテラ工法2(イプロス).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 natural destruction caused by new material extraction ■ Reduces the amount of surplus soil generated, thereby alleviating traffic pollution issues such as noise and congestion from transportation 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 ■ No mixing inconsistencies, enabling reduction of solidifying agent usage ■ Compatible with 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 materials 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 of the New Tomei Expressway.

  • IMG_5512.JPG

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

  • 液体添加装置02.JPG

    Liquid adding 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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News about this product(4)

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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