| Jan.1963 |
Sanyo Kinzoku Co., Ltd. established in Chuoh-ku, Tokyo.Osaka branch established and Sendai sub-branch established. |
| Oct.1964 |
Nagoya branch established. |
| Oct.1966 |
Hiroshima office established. |
| Apr.1970 |
Fukuoka office established. |
| Dec.1971 |
Merged with Sanpo Shokai Co., Ltd. Kyushu branch established. |
| Oct.1973 |
Received commercial rights of Sansyo Syoji Co., Ltd. |
| Jun.1979 |
Sendai sub-branch changed name to Sendai office. |
| Apr.1989 |
Became a wholly-owned subsidiary of Mitsui Mining & Smelting Co., Ltd. |
| Apr.1989 |
Osaka branch changed name to Osaka office. |
| Apr.1995 |
Fukuoka office changed name to Fukuoka branch. |
| Oct.1998 |
Merged with Taiyo Insatsu Zairyo Co., Ltd. and Printing materials division established. |
| Apr.2001 |
Sanyo Kinzoku Co., Ltd. changed name to Mitsui Kinzoku Trading Co., Ltd. |
| Aug.2002 |
Head office relocated to Kotoh-ku, Tokyo. |
| Mar.2004 |
ISO 14001 certificated. |
| Sep.2006 |
Hiroshima office changed name to Hiroshima branch. |
| Feb.2013 |
Head office relocated to Sumida-ku, Tokyo. |
| Oct.2017 |
Taiwan branch established. |
| Feb.2021 |
ISO 9001 certificated.(Metals Recycling Dept., International Sales Dept.) |
| Jun.2022 |
Closed Hiroshima branch. Hiroshima branch integrated into Osaka office.
Osaka office changed name to Osaka branch. |