Dr. Tsukamoto was a world-famous psychiatrist who owned and operated his own psychiatric clinic, the Tsukamoto Laboratory. He was adept at profiling criminals and often assisted the police. As a result, it was to him that Detective Shindo brought the seemingly insane Selina Salno when the Princess was claiming to be a Venusian. However Tsukamoto was unable to find anything wrong with Salno, mentally or otherwise. When Godzilla and Rodan attacked the nearby town, Dr. Tsukamoto and his staff fled with Shindo and the Princess to the neighboring hills to watch the ensuing battle against King Ghidorah.