In the Besshi dozan copper mine, an incident concerning an engineer, KANAYA so & so, occurred, and in 1886, KANAYA and Hiroshi HIROSE, who was shihainin (manager), were punished and the kantoku (manager) of Yamane Seirensho (smelting works), Tomokiyo OSHIMA was also punished..
別子銅山で技師金矢某の事件があり、明治19年金矢と支配人広瀬坦は罰せられ、山根製錬所の監督大島供清も罰せられた。