日本興業銀行
Teikoku almost immediately found itself short of funds, and for the remainder of the war, mainly provided short-term financing, with long-term financing for its munitions manufacturing customers mostly provided by the Industrial Bank of Japan. Dai-Ichi and Mitsui had very different corporate cultures which led to friction between the two; the two banks never completely integrated, and in October 1948, Dai-Ichi Bank separated from Teikoku Bank.