From the Keicho to the Kanei era, the gold and silver mines in Japan boasts the highest outputs in the world, and until the era of Tsunayoshi TOKUGAWA, the 5th shogun, ample fund of gold and silver were stored in the gold storehouse in Edo-jo Castle.
慶長から寛永期頃までは各地の金鉱山および銀山の産出が世界有数を誇る規模であり、五代将軍徳川綱吉の頃までは江戸城御金蔵の金銀の蓄えも潤沢であった。