大だい銀ぎん行こうだいぎんこうMeanings1nounbig bank; major bankRefers to a large-scale financial institution, often one of the major banks in Japan or globally.日本にほんの大だい銀ぎん行こうは海かい外がいにも支し店てんを持もっている。Major Japanese banks have branches overseas as well.