(slang) adult fans of an anime, a manga aimed at children

to come to mind; to occur to

(idiomatic) to come into mind, to pop into one's head

being under the table; being covert

inland waters

sightseeing boat; tour boat; pleasure boat (ship)

a large warship using during the 16-17th century in Japan

steamship

a type of military boat used between the Warring States Period and the Edo Era

a spaceship (vehicle that flies through space, designed to fly with human onboard)