After a long search, I was finally able to track their debut album down. It is really amazing that an album that is consistently listed in Top Japanese Rock Album lists has been out of print for so long. (2002 was the last time the CD was released, I believe.)
I already had Best Gedo. (Hear samples here.) That album has a fair bit of overlap with this one. Best Gedo has “Kaori” (Track 1) and “Nigeruna” (Track 5) from this album, as well as superior versions (in my opinion) of “Byun Byun” (Track 15, though the sample just has the song introduction) and “Gedou” (Track 3). The best track on the debut album for me was “Kanryo”, which I had heard on another album (Track 22) but is much better here.

The other great thing about this album is the crowd noise. One guy can be heard shouting “Gedou, the best in the world, they’re the best in the world!” at the end of both “Kaori” and “Nigeruna”. No doubt the band agreed.
This album is great. Still, considering how difficult it is to find this album and the ridiculous prices people are asking for it, I would recommend that you get Best Gedo now and wait for Gedo to be reissued.

Incidentally, “Byun Byun” and “Nigeruna” were released as singles from this album. I heard “Nigeruna” on 70′s J-ROCK LEGENDS VOL.1 (Track 10) and it’s got horns overdubbed on it!
Here’s a video for “Kaori”. The audio is from the debut album.