The Tokugawa clan that took over the Toyotomi clan was passive about advancing overseas and issued an order to prohibit building full-dress battle ships for daimyo in Japan.
豊臣氏にとってかわった徳川氏は海外進出に消極的で、大船建造の禁令を発して諸大名に本格的な軍艦を建造することを禁じた。