tenmondō; form of astrology
Historical term for a specific form of astrology practiced in pre-modern Japan, often associated with Onmyōdō. Not used in modern contexts.
In the Heian period, tenmondō was taught at the Onmyōryō (Bureau of Divination).
Compound of 天文 (tenmon, 'astronomy') and 道 (dō, 'way, path'), referring to the 'way of astronomy/astrology' as a traditional discipline. The exact historical derivation is uncertain; the term is associated with ancient Chinese-influenced astrological practices adopted in Japan.