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Company Database


about this company


3-4-2, Mita, Minato-ku, Tokyo 108-0073 Japan,

Phone Number:


Fax Number:


Company Contact Email:



168 employees


JPY 40,000,000


JPY 5.3 billion (as of September 2023)

Introduction of your company & business:

Since its founding, Ryuki Engineering has specialized in environmental control technologies, focusing on fluid machinery, with approximately 135 patents based on applications. In addition to dust collection, we develop specialized environmental testing equipment for aerospace, nuclear, and bio-related purposes. We are committed to our unique product manufacturing, striving to create the “optimal environment”.


Our corporate philosophy: As an engineering manufacturer, we strive to realize our customers’ ‘wishes’, creating excitement and joy that surpass their expectations.


1977 Founded by Akira Nishimura

1989 Ichihara Factory built in Ichihara, Chiba

1998 Tsukuba Techno Center opens

2021 Satoshi Nishimura appointed as President and CEO

2023 Tsukuba Techno Center expands and third factory built

Key Products or Services:

Our company has established a unique model by designing, manufacturing, and possessing environmental equipment which we then lease out. Our dust collector for tunnel construction holds approximately 75% of the domestic market share. We design, manufacture, and install across various domains, providing solutions to problems. We not only lend out products but also provide customers with technical expertise to flexibly customize them to address customers’ issues, guiding them toward problem resolution.    

International Operations:

China: Local partner company assembles and sells dust collectors for tunnel


Korea: Distributor sells dust collectors for tunnel construction.

Southeast Asia: Export dust collectors for tunneling projects contracted by

Japanese company.


“Global Niche Top 100 Companies (GNT Companies)” by the Ministry of Economy, Trade and Industry

“Tokyo Distinguished Service Awards: Contributions to Technological Advancement”

“Invention Award” from the Nikkan Kogyo Shimbun and The Japan Society for the Advancement of Inventions

“Corporate Value Certification” from the company, “Value Prize” Association

Company Goals & Objectives:

As we move toward our 50th anniversary in 2026, with the goal of “developing filter innovation related to Sustainable Development Goals (SDGs) and solving environmental challenges”, we are committed to strengthening research, development, marketing, and providing innovative products, technologies, and services.