Japan Post Bank Co., Ltd. (株式会社ゆうちょ銀行, Kabushiki-gaisha Yū-cho Ginkō, commonly abbreviated to ゆうちょ銀行 (Yū-cho Ginkō))

Mizuho Bank, Ltd. (株式会社みずほ銀行, Kabushiki-gaisha Mizuho Ginkō)

Sumitomo Mitsui Banking Corporation Group (SMBC Group; 株式会社三井住友銀行, Kabushikigaisha mitsui sumitomo ginkō)

MUFG Bank, Ltd. (株式会社三菱UFJ銀行)