The hospital was established in 1722 by the shōgun Tokugawa Yoshimune in the herb gardens of what is now the Koishikawa Botanical Gardens at the suggestion of the town physician Ogawa Shosen. The hospital offered its services only to the indigent. It was eventually merged into Tokyo University's medical school.[when?]
- Cybriwsky, Roman (2011). Historical Dictionary of Tokyo (Historical Dictionaries of Cities, States, and Regions). Scarecrow Press. p. 120. ISBN 9780810874893.
- "Koishikawa Botanical Gardens with 300 years' tradition". 2010. Retrieved 2014-12-14.
- Shizu Sakai (2011). "History of Medical Care at Inpatient Facilities in Japan" (PDF). JMAJ. Retrieved 2014-12-14.