Rare to see a full length orchestrated album from him:

Album title: NHKスペシャル「宇宙生中継 彗星爆発 太陽系の謎」オリジナル・サウンドトラック
Publisher: Sleigh Bells / Procyon Studio
Catalog #: SBPS-0019

SBPS-0019 | NHK Special "Uchuu Nama Chuukei Suisei Bakuhatsu Taiyoukei... - VGMdb (http://vgmdb.net/album/45130)

SLEIGH BELLS | Online Catalog (http://www.procyon-studio.com/sleighbells/index.php)