The Hosokawa and Ouchi clans clashed over who would hold true authority over the trade (in what was called the Ningbo Turmoil); following this, the Ouchi clan managed to seize de facto control over the China trade.
細川氏と大内氏が実権を巡り衝突（寧波の乱）して、以後大内氏が貿易の実権を握った。