Volcanoes on other worlds outside our Earth provide a good opportunity to compare with terrestrial ones and deepen our understanding of fundamental volcanology. The Japanese volcanology community, however, has stood back from the progress of volcanology on the other planetary bodies in the recent 20 years. This paper aims to rekindle scientific enthusiasm for planetary volcanology among the volcanology community in Japan. To prepare for approaching opportunities such as human space exploration on the other volcanic world, we should now create an environment for discussion on planetary volcanology in Japan.