Cruise - Ishi Yamada Kouhei Koukai-shi

From nici: Cruise is the story of Yamada Kohei, a doctor who gives up a landlubber medical career to serve as a ship's physician, and the people he meets on board Japan's largest luxury liner, the Phoenix. He rejects a university colleague's insistence that he turn to teaching instead, preferring to stay and learn about life as it happens from the ship's passengers.