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History
| Nov. 1937 |
| As Kenji Emura store, it is founded as dealerships such as color chemistry industrial chemicals, abrasives and the paint |
| Sep, 1948 |
| renamed "Yachiyo firm Co., Ltd" |
| Apr, 1972 |
| Started sales of Cerium Oxide (brand name Mirek made in Mitsui Mining & Smelting Co., Ltd) mainly to optics relations as a sole agent. |
| Apr, 1976 |
| Started sales of Diamond grindstone(brand name MIDIA made in Mitsui Mining & Smelting Co., Ltd) mainly to optics relations as a sole agent. |
| Feb, 1983 |
| started the design of the special abrasion system using diamond whetstones, production, and sales |
| May, 1986 |
| renamed a company name to "Yachiyo microscience Co., Ltd" |
| 2006 |
| moved the head office to Kandahigashimatsushitacho, Chiyoda-ku, Tokyo |
| Oct, 2012 |
| The ISO9001-2008 certification acquisition |
