Guinea Pig: Mermaid in the Manhole
- Cast: Shigeru Saiki, Mari Somei, Go Riju, Masami Hisamoto, Tsuyoshi Toshishige
- Duration: 63 minutes
- Genre: Horror, Romance
- Rating: 5.238/10
- Release Date: 1988-07-25
An artist dealing with the grief of his wife leaving him finds solace in painting the squalor of the sewer. He discovers a trapped mermaid, whom he brings home to heal. Her condition worsens, and she asks the artist to paint her before she dies.
