The company was established with a capital of JPY1,000,000, at 3-1-33, Kitayasue, Kanazawa City, for the purpose of mining, processing and sales of natural small grain pumice stone.  The factory was built at Ro-10 Maki-machi, Kanazawa City the same year

Acquired Hakusan Lite Co., Ltd

Increased capital to JPY2,000,000

Increased capital to JPY3,000,000

Increased capital to JPY9,000,000.  Expanded the factory and production equipment the same year

Yoshitaka Yoshikawa assumed office as the representative director

Built a new washing plant and Tsurube warehouse at Ku-13-1 Tsurube-machi, Kanazawa City

Increased capital to JPY10,000,000

Yoshikazu Yoshikawa assumed office as the representative director

Acquired ISO 9001:2000 certification in April

Completed the new Tsurube washing plant in August

Acquired ISO 9001:2008 certification in March

Relocated the drying plant from Maki-machi to Tsurube-machi, and completed the Tsurube factory in November

Acquired ISO 9001:2015 certification in April

Yoshikazu Yoshikawa assumed office as the Chairman

Kohei Yoshikawa assumed office as the representative director