Umi ni Nemuru Diamond EP4 Notes

shōrōbune
Boats that carry the souls of the deceased on them. The boats are mainly built by people who have lost a family member in the last year, though they are also built by others.
https://en.wikipedia.org/wiki/Spirit_Boat_Procession

Floating Lantern Festival
https://www.touristjapan.com/japanese-floating-lantern-festival-toro-nagashi/

Atomic Bombing in Nagasaki and the Urakami Cathedral
https://artsandculture.google.com/story/atomic-bombing-in-nagasaki-and-the-urakami-cathedral-nagasaki-atomic-bomb-museum/uwXRRfqvSwUA8A?hl=en

Bombing of Fukuoka
https://en.wikipedia.org/wiki/Bombing_of_Fukuoka

Advance, 100 million Fireballs! (Military Song)
https://www.youtube.com/watch?v=63oufeSQH-o

We don't want it, until we win (wartime slogan)
A Japanese children's song composed in 1942 , and the title is a motto that a girl in the 5th grade of elementary school wrote. These nursery rhymes and slogans were widely known to wartime children. The song was composed by Minoru Kainuma, a famous children's song composer, and the lyrics were written by Takeo Yamagami.
https://youtu.be/azXI6GZ5AlE?si=GEW8Tn4rTt4BITsb

Shoro Nagashi Spirit Boat Festival, Nagasaki - Japan (15/8/2013)
https://www.youtube.com/watch?v=IDtWqlIR1b4

Doi Doi (Swiftly) ~chant with the bells~
The chant during the spirit floating ceremony is shouted as "Dōi dōi" in time with the bells: is an onomatopoeic expression in Japanese. It's typically used to describe the sound or action of something bouncing or moving lightly and swiftly. This means being satisfied with things going as one wishes, perhaps signifying the joy of the deceased's spirit returning to the earthly realm and being reunited with their family.