Ryo Koike & Wakana Hara
Shoji Yamashiro; Kaoru Wada; Ryo Koike, Hiroaki Takahashi, Riichiro Kuwabara; Wakana Hara; Noriyuki Asakura; Yoshikazu Takayama; Koichi Suenaga; — OST 23. Tenchu. N.G. N.S. Akira 37:36
Makoto Hosoi; Wakana Hara; Ryo Koike — OST 82. Ninja gaiden 2004 sigma 27:17
Ryo Koike & Wakana Hara — Distorted World 02:44
Ryo Koike & Wakana Hara — Alma Awakened 03:28
Ninja Gaiden Σ — Labyrinth [Ryo Koike OST] 04:28
Shoji Yamashiro; Kaoru Wada; Ryo Koike, Hiroaki Takahashi, Riichiro Kuwabara; Wakana Hara; Noriyuki Asakura; Yoshikazu Takayama; Koichi Suenaga; — OST 23. Tenchu. NG. NS. Akira 02:19
Ryo Koike & Wakana Hara — Burn Away 02:52
Ryo Koike & Wakana Hara — Ninja Gaiden 04:58
Ryo Koike & Wakana Hara — Labyrinth 04:11
Ryo Koike & Wakana Hara — Emperor 03:29
Ninja Gaiden Sigma Soundtrack [15] — Collapse 02:06
Ryo Koike & Wakana Hara — Under Alert 02:06
Ryo Koike & Wakana Hara — Revival of The Dead 02:22
ninja gaiden sigma — one shot one kill 05:03
Ryo Koike & Wakana Hara — Ninja Gaiden Theme 04:58
Ryo Koike & Wakana Hara — Supply Base 02:00