■1939
16 November
Ujiden Chemical Industry Co., Ltd. was established through a partnership between Ujigawa Electric Co., Ltd. in Osaka city (currently Kansai Electric Power Company, but no capital relationship with this company now.) and Nishiyama Gomei Kaisha (unlimited partnership) in Kochi City.
President: Uichiro Koike/ Capital: 600,000 yen/145 employees.

■1940年
10 June
The first factory was completed and production began. Due to the lack of materials during the war, all buildings were made of wood. The electric furnace was a three-phase Héroult open-type arc furnace with five heating systems. Maximum 600KVA, usually 500KVA.
1 November
Sales of alundum (current JIS-A high alumina quality) abrasive grain "Tosandam". Its sales were outsourced to Nishiyama Gomei Kaisha.
December 14
The head office of Nishiyama Gomei Kaisha in Tanezakicho was completely burned down. It was relocated to the current site, in front of Kochi Station after reconsideration of site conditions.

■1947
After purchasing ingots, Tosa Emery was invented by crushing and sizing Tosandum, and the sale of Tosa Emery began.
A used conical ball mill was introduced.
A processing plant branch was established and the production of "Tosa Emery" fine powder began.

■1951
Production and sale of artificial emery Tosa Emery Extra of higher quality than imported natural emery began.
A ceremony for the new product was held.

■1953
Production of Tosandam was halted and a full-scale production system for Tosa Emery Extra began.

■1959
June
To expand the export of Tosa Emery Extra, we made overseas business trips for market research and technical services at our export destinations such as Hong Kong and Taiwan.

■1960 　
September
The Osaka branch office was established.

■1962 　
December
Our capital increased to 60 million yen.

■1965
January
The Tokyo office was established to collect market information mainly about technology services.

■1978 　
December
Increased in capital to 150 million yen.

■1982 　
October
The development of plastic media (PC) began.

■1984 　
March
The development and sale of Tosa Abrasives began.
May
The plastic media (PC) prototype plant was completed and plastic media sales began.

■1988年 　
April
Business division system was established. Development Department, General Affairs Department, Emery Division, Ceramic Division. The Osaka branch office was renamed to the Osaka Marketing Center and the Tokyo branch office was renamed to the Tokyo R&D Center.

■1989 　
16 November
The 50th anniversary ceremony was held.

■1991 　
November
The development of dry compounds began.
The wet high speed centrifugal barrel polishing machine (LC920 type).was completed.
December
The sale of dry tumbling media began.

■1992 　　
July
The dry high speed centrifugal barrel polishing machine (LC1000 type) was completed.
December
The sale of dry compounds began.

■1995 　　
September
The sale of recycled stones began (Practical use of remelted slag began).

■1999 　
February
The 60th anniversary celebration and commemorative ceremony were held.

■2000 　
April
SO9002 (production of artificial emery abrasives) was obtained.
The sale of the dry polishing systems began.

■2003 　
June
ISO 9001:2000 (design, development and production of artificial emery abrasives) was obtained.

■2010 　
June
ISO 9001:2008 (design, development and production of artificial emery abrasives) was obtained.

■2011　
Market research for business expansion in Germany began.

■2012 　
Regenerated abrasive grain business began.
Tosa Fine Polish production began.

■2013
The Osaka Office was relocated.

■2014 　
MARIMO nanograin business began.

■2015
The sales of TSB began.

■2016
The sales office was established in Germany.
A new barrel equipped with IoT was exhibited at the Machine Element Technology Exhibition.

■2017
Exhibition at the Deburring EXPO, which was a deburring and polishing technology exhibition in Germany
Exhibition at 30th China International Surface Treatment Exhibition

■2018
The Kagami factory was completed (East Kochi).
CE certification was obtained for the barrel polishing machine for the European market. The sales began.
The yard for materials used to produce Tosa Emery was completed.

■2019
The comprehensive cooperation agreement was concluded with Kochi University of Technology.
November
The 80th anniversary celebration and commemoration were held.