Sources:
Kazuyoshi Yaginuma Blog: https://web.archive.org/web/20041206002711/http://8057.teacup.com/yaginuma/bbs
(I understand that my translation of this blog post is more like a paraphrasing, but man the way it translates directly is so janky, so I'm sorry for that)
The rest was in conversation with people and as such will be linked on my blog/ 2nd channel
Inoue Conversation https://youtu.be/lvTQA3iyuaE
Hirose Conversation https://www.eva.lgbt/post/679422864669212672/hirose-conversation
Kamui Conversation https://www.eva.lgbt/post/679423091266535424/fujiwara-kamui-conversation