Umi ni Nemuru Diamond EP1 Notes

Champon
https://en.wikipedia.org/wiki/Champon

Champon can be eaten in Nagasaki or at Ringer Hut, Japanese nationwide champon restaurants. Champon actually also means "drink several types of alcohol". The word comes from champon is a mixture of noodle, vegetables, meat and seafood. The Mixing the alcoholic drinks inside the stomach is a Japanese culture and custom.
https://www.evolutionjapantour.com/post/champon

Hashima
https://www.asahi.com/ajw/articles/15130043

The Takarazuka Revue is a Japanese all-female musical theatre troupe based in Takarazuka, Hyōgo Prefecture, Japan.
https://en.wikipedia.org/wiki/Takarazuka_Revue

Hashima Ondo (Japanese folk song) - Female Singer is Kondo Keiko (近藤圭子)
https://youtu.be/Hdlsr1nAleo?si=NDU_ALpzeOrzkS7j&t=60
[Note] I translated the lyrics to the best of my ability.

Bon-Odori
https://www.inhamamatsu.com/culture/bon-odori.php

Max Factor Crème Puff Powder
https://i.ibb.co/mHBZyNw/creamepuff.png

Anpan
https://en.wikipedia.org/wiki/Anpan

Karasumi
https://en.wikipedia.org/wiki/Karasumi

Hyakunin Isshu: Poem #22 by Fun'ya no Yasuhide
https://100poets.com/2011/10/24/poetry-as-wordplay/

Marie Laurencin
https://www.artnet.com/artists/marie-laurencin/