1947

May	Established as a subsidiary of Mitsubishi Mining Company Ltd.(now Mitsubishi Materials Corporation). We started the business to supply operation goods to our parent company and works as their nonlife insurance agent.

1962

March	Construction division expanded following registration with the Ministry of Construction under the Construction Business Act

1989

December	Opened a branch in Singapore

1995

December	Opened a branch in Seoul

1996

March	Established Ryoko Services Corporation by means of merger of service subsidiaries

1999

April	Established Ryoko Sangyo (Thailand) Co., Ltd.

2001

April	Merged with Sanko Materials Co., Ltd.

2003

October	Merged with Godo Kinzoku Co., Ltd.

2004

April	Opened an office in Shanghai Kanagawa Branch examined and registered as ISO 14001-compliant organization
December	Branches in Osaka and Himeji examined and registered as ISO 9001-compliant organization

2005

September	Entire company examined and registered as ISO 14001-compliant organization

2006

September	Opened a branch in Perth Australia.

2007

January	Merged with Maruse Co., Ltd.
August	Became a wholly-owned subsidiary of Mitsubishi Materials Corporation through a stock swap

2010

April	Opened an office in Gimpo, South Korea

2011

March	Silicon Parts Group examined and registered as ISO 9001 compliant.
September	Opened an office in Hanoi.
October	Fukuoka Branch and Nagasaki Office examined and registered as ISO 9001 compliant

2012

October	Opened an office in Eunos, Singapore.

2013

April	Established PT. Ryoko Sangyo Indonesia

2014

July	Changed company name to Mitsubishi Materials Trading Corporation

2015

January	Succeeded precious metals business from Mitsubishi Materials Corporation

2020

April	Opened an office in Taipei.
October	Entire company examined and registered as ISO 9001-compliant organization. (Complies with ISO 14001 under integrated operation.)