ZUIUN MARUHyuuga, the one seen at the bow of the ship with glasses, seems to have a thing with Zuiuns after remodeling into a BBV.
(https://en.wikipedia.org/wiki/Aichi_E16A)
Maru (丸, meaning circle) is a common suffix in Japanese merchant and civilian ships.
(https://en.wikipedia.org/wiki/Japanese_ship-naming_conventions#Merchant_ships)
(https://en.wikipedia.org/wiki/Aichi_E16A)ZUIUN