Because people still ask for their demos: I've contacted haisuinonasa directly and the guitarist Yoshimasa-san answered in flawless english. He said that their label has no copy of their demos and he himself hasn't one, not even as a digital version on his computer. But he was really, really happy that people outside of japan listen to their music and "We are thinking to release and play shows overseas in the near future, and we really would love to go to Germany as well." So no, no demos. But he sent me an unreleased track that wasn't even distributed in japan called "椅子と楽器のある部屋" Isu to gakki no aru heya (A room with a chair and instrument). It's nothing special, very minimal, but still pretty cool.
Does anyone know where to get their early demos? They are listed on their wikipedia page but it is difficult to locate them since I do not speak Japanese. If anyone has them available for download or can point me to a link to purchase them it would be greatly appreciated. The first and second Demo appear to have songs that were not featured anywhere else.
My music is greatly influenced by this band, so I thought I'd do some self-advertisement here. http://cacolo.bandcamp.com If you like the music, be sure to like the Facebook page and share it with your friends! :D