Beside You Yu Watanabe 15th Anniversary ~Collaboration Best~

あさひいろのカーテン - Moaning Light Curtain (feat. Ayuko Ikeda & Shuhei Uehara)

Perk up (feat. Ayuko Ikeda & Shuhei Uehara)

Railroad (feat. Ayuko Ikeda & Shuhei Uehara)

Side by Side (feat. Ayuko Ikeda & Shuhei Uehara)

Y.K.O. (feat. Toshihiro Nakanishi)

森のプロムナード - Forest Promenade (feat. Saburo Tanooka)

空飛ぶ自転車 - Flying Bicycle (feat. IWAO)

雲のいえ - House of the Cloud (feat. Ayuko Ikeda & Shuhei Uehara)

Time MachiTime Machinene (feat. Ayuko Ikeda & Shuhei Uehara)

Plvs Vltra (feat. Ayuko Ikeda & Shuhei Uehara)

Nightmare (feat. Ayuko Ikeda & Shuhei Uehara)

三日月ぶらんこ - Crescent Swing (feat. Toshihiro Nakanishi)

Baby you. (feat. Rikuo)

ガーベラ - Gerbera (feat. Hajime Sakita)

Storyteller (feat. Akidori)

マクのテーマ - Thema of Maku (feat. Shima Takada)

マクのクリスマス - Christmas of Maku (feat. Etsuko Hatsuta)

マクの約束 - Promise of Maku (feat. Alchemist)

初恋 - First Love (feat. Chikuzen Sato)

暖炉とロッキングチェア - Fireplace and Rocking Chair (feat. Tadashi Hirosawa)

Letters to parents (feat. Etsuko Hatsuta)

ふたりの空気 - The Air Between Us (feat. Sinon)

Airblanket (feat. Etsuko Hatsuta)

神様との約束 - A Promise to God (feat. Etsuko Hatsuta)

風の電話 - The Wind Phone (feat. Etsuko Hatsuta)