In 1909, he was head-hunted to transfer from a steel mill in Handa-cho, Chita County, Aichi Prefecture (currently Handa City) to 'Meika Lumber mill' in Nakagawate Village, Higashichikuma County, Nagano Prefecture (currently Azumino City), and there he was presumably engaged in the experimental production of a bomb to assassinate Meiji Emperor.
1909年、愛知県知多郡半田町（現・半田市）の鉄工所から長野県東筑摩郡中川手村（現・安曇野市）の「明科製材所」にヘッドハントされて移り、当地で明治天皇を暗殺するためとして爆弾を試作したという。