- HD 1080
- Runtime: 87m.
- Status: Released
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- Languages: ja
- Country: Germany, Japan
- Director: Shinji Imaoka
- Stars: Sawa Masaki, Yoshirô Umezawa, Ai Narita, Mutsuo Yoshioka, Fumio Moriya
- keywords: musical, romantic comedy, reincarnation, fish factory, anal sex, sexploitation, pink film, dance number, interspecies romance, musical comedy, kappa, romantic fantasy, fantasy comedy
- Production_studio: INTERFILM, Kokuei Company, Rapid Eye Movies
- The Underwater Love is featured in the top rankings of 2011
- #56 in Top Fantasy Movies of 2011
35-year-old Asuka works in a lakeside fish factory. She’s about to be married to her boss, Taki, but one day, she encounters a kappa – a water sprite found in Japanese folklore – and learns that the creature is in fact the reborn form of Aoki, an old crush who’d drowned when they were 17.