Obsolete philosophical term for ontology; modern Japanese typically uses 存在論 (そんざいろん) instead. This term may appear in older texts or historical discussions of philosophy.
See also: 存在論
江戸時代の哲学書には「本体論」という言葉が見られる。
The term 本体論 can be found in Edo-period philosophical writings.
Nowadays, 存在論 is more common than 本体論.