In Kai, there were gold mines such as Kurokawa Kinzan (Kurokawa Gold Mine), Yunooku Kinzan (Yunooku gold mine), that boasted bountiful reserves of gold and were operated during the period governed by Shingen.
甲斐には黒川金山や湯之奥金山など豊富な埋蔵量を誇り信玄期に稼動していた金山が存在した。