Tokyo, April 1910 was an un-produced episode of The Young Indiana Jones Chronicles, which would have been part of the third season of the series.
The subject of the episode was to have been about marine biology with the themes of honor and the interdependence of species. A ten year old Indiana Jones would visit Peers School in Tokyo, Japan and go on to meet future emperor Hirohito. Over the course of the episode, Jones would learn about Japanese society then he and Hirohito would go whale-watching leading to a shark attack. The boys would be rescued by a samurai.
While the episode went unproduced, Hirohito was referenced as part of the West End Games roleplaying game supplement Indiana Jones and the Rising Sun (1994) and later mentioned in the novel Indiana Jones and the Secret of the Sphinx (1999). Indiana Jones: The Ultimate Guide (2008) later made mention that Helen Margaret Seymour got to see the gardens of Kyoto during the world lecture tour.