As production of gold and silver increased in gold and silver mines across Japan in the (Japanese) Sengoku period, there emerged 'kinya' (gold dealers) and 'ginya' (silver dealers) who refined, appraised and traded in gold and silver bullions brought in by speculators.
さらに、戦国時代(日本)に入り全国の金山および銀山の産出が増大するにつれ、山師の持ち込む金銀地金の精錬、鑑定および売買を行う金屋および銀屋も現れた。