To create surprise, the Kaiten entered Miyako harbour with an American flag, and the Banryu with a Russian one. They raised the Bakufu flag seconds before boarding the Kotetsu.
To create surprise, the Kaiten and Banryu used flags of different countries (American and Russian) to signal their arrival in Miyako harbor. They raised the Bakufu flag as a final act before boarding the Kotetsu.