Suikoden - Dec. 15, 1995 - Miki Higashino, Tappy Iwase, Hirofumi Taniguchi, Mayuko Kageshita, and Hiroshi Tamawari
Tamawari did two tracks for this game. A full compositional breakdown as been compiled by myself at the VGMdb forums. A big thanks to the previous posters on the thread for figuring out so much - all I did was make the list.
Ganbare Goemon: Space Pirate Akogingu - Mar. 22 1996 - Hiroshi Tamawari, Akira Yamaoka, Michiru Yamane, Tappy Iwase, Motoaki Furakawa, Kosuke Soeda, and Shoichiro Hirata
Confirmed through the VGMO interview! The remaining composers come from Mobygames.
Snatcher - Mar. 29, 1996 - Kazuki Muraoka, Motoaki Furakawa, Akira Yamaoka, Hiroshi Tamawari, "Kida Sun", and Shoichiro Hirata
These credits are from Sega Retro and apply just to the Sega Saturn version. The reliability of this is as such not 100% certain. It is possible "Kida Sun" is Kosuke Soeda, but this isn't confirmed.
Vandal Hearts - Oct. 25, 1996 - Hiroshi Tamawari, Miki Higashino, Kosuke Soeda, and Masahiro Yamauchi
Lightning Legend - Dec. 20, 1996 - Hiroshi Tamawari, Ohamo Kotetsu, Akira Yamaoka, Yoshifumi Ushima, and Yasuo Asai
Azure Dreams - Nov. 13, 1997 - Hiroshi Tamawari
Tamawari's favorite of the scores he wrote. There's also a Game Boy port with a brand new original soundtrack implementing Tamawari's main theme and possibly a couple other pieces, but we don't know who composed that one.
Twinbee RPG - Apr. 2 1998 - Hiroshi Tamawari and Hidenori Maezawa
Vandal Hearts II - Jul. 8, 1998 - Hiroshi Tamawari
After this score, Tamawari left Konami. He gave his reasons in an interview on VGMOnline...
PATRICK: You left Konami after completing Vandal Hearts II to pursue a career as a non-game musician. What made you decide to leave Konami and the videogame industry?
TAMAWARI: It's because game music has too many battle tracks! There are always demons inside the enemies, people exposing their ambitions, and a need to always fight something. However, fighting isn't everything there is to the world: there are also moments shrouded in peace, love, and fun, which are what push these ambitions back and allow us to bear with the sadness. I didn't think it was very good for my own music to lean solely towards fighting. At the same time, I strongly started thinking that I wanted to try out making music for the musicals and operas I was so interested in since my college student days.