(゜o゜)
On page 5 when she mentions "Melos," that's about a 1940s novel by Dazai Osamu.
https://rawrvolitans.wordpress.com/2011/06/23/run-melos-osamu-dazai/
Here are the sources for the notes, bunch of interesting stuff, I'll do more notes about the instruments as they come up, but anyway:
https://wa-gokoro.jp/wagakki/Japanesedrum/342/
https://mikoshistorys.com/wadaiko-2506.html
https://shishi-taiko.com/kiso/syurui/
https://www.shinrin-ringyou.com/tree/keyaki.php
http://www.mikoshi.or.jp/drum-qa
And JP wiki (that gives me a dank url, better just google).
(*^-^*)