Shadow Calling Dark (ActRock & Katsu feat. 空音)
We Are the Spark (ActRock & Katsu feat. 空音)
Faith of Eternity (ActRock vs. Katsu feat. ふうか)
Lady Lazy (ActRock vs. Katsu feat. ふうか)
M. O. N. E. Y. (Arm feat. 空音 & Katsu)
Dig Up Rave (D.Watt feat. 沙 & Katsu)
Zekka (Haseko & Katsu feat. 空音 & ふうか)
Stray Night (Haseko feat. ふうか & Katsu)
The Seventh Sense (Katsu & Ruslan Device)
Cassiopeia (Katsu & Ruslan Device vs. PITTARIUS CODE)
In Our Dreams (Katsu & Ruslan Device vs. PITTARIUS CODE)
あなたの代わりに誰がなれるというの？ (Katsu & Soul Fingers)
いつまでもいつまでも (Katsu & Soul Fingers)
傷だらけのヒーロー (Katsu & Soul Fingers)
友達にはなりたくない (Katsu & Soul Fingers)
夢のよう夢のよう (Katsu & Soul Fingers)
Throw Off Disguise... (Katsu + Sumijun feat. 越田Rute隆人 x あき)
紅Rouge (Katsu + Sumijun feat. 雨宿どみ乃)
Unknown Destination (Katsu feat. 3L)
Sound Effect (Katsu feat. 4TUNAT)
Marisa Is Back (Katsu feat. Momobako)
Prominence of God (Katsu feat. Momobako)
Eternal Wing (Katsu feat. Nachi Sakaue)
Everyday Everynight (Katsu feat. 雨宿どみ乃)
Dance All Nigth (Katsu, E1forya)
Add Another Win (MIDI MASTA, Mav, Flawless, Furious (39), Katsu)
Blue Sand (Ruslan Device & Katsu)
Ocean Love (Ruslan Device & Katsu)
Skyline (Ruslan Device & Katsu)
The June Rain (Ruslan Device & Katsu)
Transatlantique (Ruslan Device & Katsu)
Two Hearts (Ruslan Device & Katsu)
White Night (Ruslan Device & Katsu)
You & I (Ruslan Device & Katsu)
Inception (Ruslan Device & Katsu vs. Onstream89)
A Touch of Love (Ruslan Device feat. Katsu)
You Are My Paradise (Ruslan Device feat. Katsu)
Cassiopeia (Ruslan Device, PITTARIUS CODE & Katsu)
Dystopia (Tsukasa + Katsu feat. 花たん)
Extra Party Time (Tsukasa + Katsu feat. 雨宿どみ乃)
Liar Communication (Tsukasa + Katsu feat. 雨宿どみ乃)
Paparazzi (Tsukasa + Katsu feat. 雨宿どみ乃)
乙女文楽 (Tsukasa + Katsu feat. 雨宿どみ乃)
Help Me, Erinnnnnn!! (Tsukasa feat. 空音 & Katsu & 雨宿どみ乃)