Onipedia is a comprehensive online encyclopedia dedicated to the works of Onisaburo Deguchi and the spiritual narratives of the "Spirit World Stories" (霊界物語). Operated by Hiroaki Iizuka, Onipedia currently features 3,616 articles and 784 images, with plans to expand to approximately 20,000 entries by the projected completion date of March 3, 2033. As a beta project, it provides in-depth coverage of geographical locations found within the Spirit World Stories and foundational concepts, although it is still in the early stages of development.

In the future, Onipedia aims to integrate with other platforms, including "Spirit World Stories Network" for reading, "Onin DB" for searching, and "Onipedia" for learning, creating a cohesive ecosystem for exploring this extensive lore. Users can discover newly added pages or utilize Google search within the platform to enhance their learning experience. Onipedia stands as a vital resource for those interested in the intricate universe of Deguchi's spiritual teachings.