Although its ore is poor, ore reserves are inexhaustible and in the same year, Nihon Kako established Oeyama Nickel Kogyo Co., Ltd., obtained a mining concession and continued the survey.
貧鉱ながらも鉱量は無尽蔵であり、同年中に子会社として大江山ニッケル工業（株）を設立し、鉱業権を取得、調査を継続した。