天てん文もん博士はかせ

noun

court astronomer/astrologer (ritsuryō system)

Historical official title under the ritsuryō system, responsible for astronomy, astrology, and calendar-making. Archaic; no modern equivalent.

• 天てん文もん博士はかせは律りつ令りょう制せい下かで暦こよみの作さく成せいや天てん文もん観かん測そくを担たん当とうした。

  The tenmon hakase was responsible for calendar-making and astronomical observation under the ritsuryō system.