Yoshimitsu, who adored Ming culture, pressed the Imperial Court to use the Chinese character 洪 in the name of Japanese eras after the Taizu of Ming, Emperor Hongwu (洪武帝), but this was rejected by for various reasons, including the facts mentioned above.
明の文化に心酔していた義満は明の太祖・洪武帝にあやかって日本の年号にも「洪」の字を使うよう朝廷へ圧力をかけたが、上記の理由もあり朝廷側が拒否したため実現しなかった。