After the Pacific War broke out, Mujin companies became the target of wartime integration and a Second Association of Regional Banks asserted in an anniversary magazine that they were 'forced to merge' into one company per prefecture, but this was not a clear disposition performed based on direct law like the Land Transportation Business Coordination Act, therefore, actual conditions are not known.
太平洋戦争勃発後、無尽会社は戦時統合の対象とされ、都道府県別に1社に「強制的に合併させられた」と第二地方銀行協会は記念誌で主張しているが、これは、陸上交通事業調整法のような直接的法律に基づき行なわれた明確な処分ではないので、実態は未詳である。