Bride in a Bathing Suit (1954)

Katsuko, daughter of a prestigious inn owner, is urged into an arranged marriage with Keisuke, the nephew of a powerful businessman. She refuses, believing she already loves a man she once briefly met on a train. Unbeknownst to her, that man is Keisuke himself. A mix-up with photos leads to misunderstandings, but on the eve of his departure for America, the truth comes to light, and the two reunite just in time.