Draft:Astronomical Department

Comment: Note: This draft started from a complete copy of Onmyōji as it has a lot of redlinks with claims I want to keep. I will trim down into just the claim on an individual thing laterImmanuelle ❤️💚💙 (talk to the cutest Wikipedian) 01:47, 25 April 2023 (UTC)

The Astronomical Department [ja] was an institution established by the Tokugawa shogunate with the duty of producing calendars.

They were established under the Temple and Shrine Magistrates and created the Tenpō calendar, which was said to be considerably more accurate than the Tsuchimikado family's Hōryaku calendar or even the Jōkyō calendar, which was considered more accurate than the Hōryaku calendar.

In 1684, Shibukawa Shunkai, an astronomer of the Tokugawa shogunate, completed the first calendar made by Japanese, the Jōkyō calendar. The Xuanming calendar, which had been in use for 823 years, was reformed by the Jōkyō calendar, and the Tsuchimikado family lost the authority to arrange the calendar to the Tokugawa shogunate. About 70 years later, in 1755, the calendar was reformed again when Tsuchimikado Yasukuni [ja] created the Hōryaku calendar. The Tsuchimikado family regained the authority to arrange and reform the calendar. However, the Hōryaku calendar had many flaws and was considered to be rather inferior to the scientifically created Jōkyō calendar.

Later, the Astronomical Department [ja] established under the Tokugawa shogunate's Temple and Shrine Magistrates regained control and created the Tenpō calendar, which was said to be considerably more accurate than the Tsuchimikado family's Hōryaku calendar or even the Jōkyō calendar, which was considered more accurate than the Hōryaku calendar.

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Murakami, Shūichi, ed. (1981). 日本陰陽道史総説 [A Review of the History of Onmyōdō in Japan] (in Japanese). Hanawa Shobō. ISBN 4827310572.
Endō, Katsumi (1994). 近世陰陽道史の研究 [Studies in the History of Early Modern Onmyōdō] (in Japanese). Shin Jinbutsu Ōrai Sha [ja]. ISBN 4404021569.
Kosaka, Shinji (2004). 安倍晴明撰『占事略決』と陰陽道 [Abe no Seimei's "Senji Ryakketsu" and Onmyōdō] (in Japanese). Kyūko Shoin [ja]. ISBN 9784762941672.
Saitō, Rei (2007). 王朝時代の陰陽道 [Onmyōdō in the Dynastic Period] (in Japanese). Meicho Kankō Kai. ISBN 978-4839003302.
Yamashita, Katsuaki (1996). 平安時代の宗教文化と陰陽道 [Religious Culture in the Heian Period and Onmyōdō] (in Japanese). Iwata Shoin. ISBN 4900697656.
Takahashi, Keiya (2000). 現代・陰陽師入門 [Introduction to Modern Onmyōji] (in Japanese). Asahi Sonorama. ISBN 4257035846.
Nakamura, Shōhachi (2000). 日本陰陽道書の研究増補版 [A Study of the Onmyō Books in Japan; Expanded Edition] (in Japanese). Kyūko Shoin. ISBN 4257035846.
Suzuki, Ikkei (2002). 陰陽道呪術と鬼神の世界 [Onmyōdō: The World of Spells and Demons] (in Japanese). Kōdansha. ISBN 9784062582445.
Seimei Shrine, ed. (2002). 安倍晴明公 [The Right Honorable Abe no Seimei] (in Japanese). Kōdansha. ISBN 9784062109833.
Hayashi, Jun; Koike, Jun'ichi (2002). 陰陽道の講義 [Lecture on Onmyōdō] (in Japanese). Sagano Shoin. ISBN 4782303610.
Shigeta, Shin'ichi (2005). 平安貴族と陰陽師 [Heian Nobles and Onmyōji] (in Japanese). Yoshikawa Kōbun Kan. ISBN 4642079424.
Hayashi, Jun (2005). 近世陰陽道の研究 [A Study of Early Modern Onmyōdō] (in Japanese). Yoshikawa Kōbun Kan. ISBN 4642034072.
Shigeta, Shin'ichi (2006). 陰陽師 [Onmyōji] (in Japanese). Chūōkōron-Shinsha. ISBN 4121018443.
Murakami, Shūichi, ed. (2017). 陰陽道叢書 1 古代 [Onmyōdō Series 1: The Ancient Times] (in Japanese). Hanawa Shobō. ISBN 978-4626017970.
Murakami, Shūichi, ed. (2017). 陰陽道叢書 2 中世 [Onmyōdō Series 2: The Middle Ages] (in Japanese). Hanawa Shobō. ISBN 978-4626017987.
Murakami, Shūichi, ed. (2017). 陰陽道叢書 3 近世 [Onmyōdō Series 3: The Early Modern Period] (in Japanese). Hanawa Shobō. ISBN 978-4626017994.
Murakami, Shūichi, ed. (2017). 陰陽道叢書 4 特論 [Onmyōdō Series 4: The Advanced Studies] (in Japanese). Hanawa Shobō. ISBN 978-4626018007.

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