The Sixth National Bank (Higo Bank [there is no relationship with the current Higo Bank]) -> 11 banks including the Sixth National Bank were merged into the Hozen Bank in 1923 (the current Mizuho Bank after the Yasuda and the Fuji Bank).
第六国立銀行（肥後銀行（現在の肥後銀行とは無関係））→1923年に当行等11行保善銀行（安田、富士銀行を経て現在のみずほ銀行）に合併