Addressed to the hospital - Addressed to the hospital

...The first appearance of a letter to the Togusho in historical documents was in 909 (Engi 9), which suggests that the letter to the Togusho began in the Kanpei to Engi era (late 9th century to early 10th century). (2) Inmiya The ceremony to appoint Innoshi to betto (head of various offices) such as Gogansho (prayer office), Gofukusho (official office), Shisho (official office of the deceased), and Betsunosho (official office of the deceased), in the Incho (Incho), is called an Insho-send, and the first appearance was in 984 (Eikan 2) to Enyu-insho. The ceremony to appoint officials below the rank of Daibu and Ryo to Koto (official office of the deceased), Shoko-yori (official office of the deceased), and Shisho (official office of the deceased), in the Togubo and Chugusho (Central Palace Office), is called an Insho-send and a Chugusho-send, respectively....

*Some of the terminology explanations that refer to "addressed to the hospital" are listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

…所宛の史料的初見は909年(延喜9)であり，所宛が寛平～延喜初年(9世紀末～10世紀初)に始まったことを推定させる。(2)院宮　院庁で院司を御祈願所，御服所，仕所，別納所など所々の別当に補任する儀を院所宛といい，初見は984年(永観2)円融院所宛。東宮坊，中宮職で大夫，亮以下の職員を所々勾当，所預，史生等に補任する儀を，それぞれ東宮所宛，中宮所宛という。…

※「院所宛」について言及している用語解説の一部を掲載しています。

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