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Company name

INVAX Corporation


 23-1 Kakura, Iwatsuki-ku, Saitama-shi, Saitama 339-0056, Japan


Yoshikuni Akiyama, Representative director and President


August 1st, 2000


63.85 million yen

Business Description

Utilization of soil solutions business

Civil engineering design consulting business

Collaborating company / Main clients:

Nippon Steel Metal Products Co., Ltd.

Kyowa Concrete Industry Co., Ltd.

Hitachi Construction Machinery Japan

Nippon Steel Corporation


Sabo Frontier Foundation

national construction companies

civil engineering consultants,  etc.

Net Sales (as INVAX group)

564 million yen (as of July 2023 fiscal year)

510 million yen (as of July 2022 fiscal year)

559 million yen (as of July 2021 fiscal year)

Number of employees (INVAX group)

55 *as of January, 2024 

Qualification holders (INVAX group)

Doctor of Agriculture: 1

Comprehensive Technical Supervisor in Engineering: 1

Construction Engineer: 3

Assistant Construction Engineer: 4

Real Estate Transaction Specialist (formerly Real Estate Transaction Chief): 1

Class 1 Civil Construction Management Engineer: 2

Second-class Architect: 1

Soil and Slope Management Engineer: 2

Concrete Engineer: 1

Basic Information Technology Engineer (formerly Second-Class Information Processing Engineer): 2

IT Passport (formerly Junior System Administrator): 1

Group companies

Soil Technology Corporation

Hokkaido Soil Recycling Institute Corporation