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Unhappy Birthday Koubun
From generasia





- Artist
- Sakurazaka46
- Single
- Unhappy birthday Koubun (Unhappy birthday構文; Unhappy birthday Syntax)
- Released
- 2025.10.29
- Catalog Number
- SRCL-13430~1 (Limited Edition Type-A)
- SRCL-13432~3 (Limited Edition Type-B)
- SRCL-13434~5 (Limited Edition Type-C)
- SRCL-13436~7 (Limited Edition Type-D)
- SRCL-13438 (Regular Edition)
- Price
- ¥2,000 (Limited Editions)
- ¥1,200 (Regular Edition)
- Limited Edition Type-A CD Tracklist
- Unhappy birthday Koubun (Unhappy birthday構文)
- Alter ego
- Kogarashi wa Nakanai (木枯らしは泣かない; The Cold Wind Doesn't Cry)
- Unhappy birthday Koubun -OFF VOCAL ver.-
- Alter ego -OFF VOCAL ver.-
- Kogarashi wa Nakanai -OFF VOCAL ver.-
- Limited Edition Type-A Blu-ray Tracklist
- 12th Single BACKS LIVE!! ~Center Performance Collections~ <Part 1>
- Minatoku Parsley (港区パセリ)
- Utsukushiki Nervous (美しきNervous)
- Koi ga Zetsumetsu Suru Hi (恋が絶滅する日)
- Anthem time
- Koi wa Muitenai (恋は向いてない)
- Nando LOVE SONG no Kashi wo Yomikaeshita Darou (何度 LOVE SONGの歌詞を読み返しただろう)
- Limited Edition Type-B CD Tracklist
- Unhappy birthday Koubun (Unhappy birthday構文)
- Alter ego
- Aozora ga Mieru Made (青空が見えるまで; Until the Blue Sky Appears)
- Unhappy birthday Koubun -OFF VOCAL ver.-
- Alter ego -OFF VOCAL ver.-
- Aozora ga Mieru Made -OFF VOCAL ver.-
- Limited Edition Type-B Blu-ray Tracklist
- 12th Single BACKS LIVE!! ~Center Performance Collections~ <Part 2>
- Moshika Shitara Shinjitsu (もしかしたら真実
- Blue Moon Kiss (ブルームーンキス)
- Cool
- Nakasete Hold me tight! (泣かせて Hold me tight!)
- Kimi no Koto wo Omoi Nagara (君のことを想いながら)
- Limited Edition Type-C CD Tracklist
- Unhappy birthday Koubun (Unhappy birthday構文)
- Alter ego
- I will be
- Unhappy birthday Koubun -OFF VOCAL ver.-
- Alter ego -OFF VOCAL ver.-
- I will be -OFF VOCAL ver.-
- Limited Edition Type-C Blu-ray Tracklist
- Sakurazaka46 4th Generation "First Showcase" <Part 1> (櫻坂46 四期生「First Showcase」 <前編>)
- OPENING
- Tokugi Hirou (特技披露; Showing Off Special Skills)
- Shifuku Fashion Show (私服ファッションショー; Casual Fashion Show)
- Limited Edition Type-D CD Tracklist
- Unhappy birthday Koubun (Unhappy birthday構文)
- Alter ego
- Buddies (English Version)
- Unhappy birthday Koubun -OFF VOCAL ver.-
- Alter ego -OFF VOCAL ver.-
- Buddies (English Version) -OFF VOCAL ver.-
- Limited Edition Type-D Blu-ray Tracklist
- Sakurazaka46 4th Generation "First Showcase" <Part 2> (櫻坂46 四期生「First Showcase」 <後編>)
- OPENING VTR
- Overture
- DANCE TRACK
- Jigoujitoku (自業自得)
- Drone Senkai Chuu (ドローン旋回中)
- Shindafuri (死んだふり)
- VTR
- Shijima no Bouryoku (静寂の暴力)
- I want tomorrow to come
- Sakurazaka no Uta (櫻坂の詩)
- Regular Edition CD Tracklist
- Unhappy birthday Koubun (Unhappy birthday構文)
- Alter ego
- Yozora de Ichiban Kagayaiteru Hoshi no Namae wo Boku wa Shiranai (夜空で一番輝いてる星の名前を僕は知らない; I Don't Know the Name of the Brightest Star in the Night Sky)
- Unhappy birthday Koubun -OFF VOCAL ver.-
- Alter ego -OFF VOCAL ver.-
- Yozora de Ichiban Kagayaiteru Hoshi no Namae wo Boku wa Shiranai -OFF VOCAL ver.-
- Information
"Unhappy birthday Koubun" is the thirteenth single released by Sakurazaka46. It was released in five versions: four limited CD+Blu-ray editions in types A, B, C, and D, and a regular CD-only edition.
Selected Members

"Unhappy birthday Koubun"
Names in bold indicate the Sakura Eight.
- (Center: Murai Yu)
- 2nd gen: Ozono Rei, Tamura Hono, Fujiyoshi Karin, Matsuda Rina, Morita Hikaru, Moriya Rena, Yamasaki Ten
- 3rd gen: Ishimori Rika, Endo Riko, Matono Mio, Mukai Itoha, Murai Yu, Murayama Miu, Yamashita Shizuki
"Alter ego"
Artist: 4th Generation (四期生)
- (Center: Yamakawa Ui)
- 4th gen: Asai Konomi, Inaguma Hina, Katsumata Haru, Sato Neo, Nakagawa Chihiro, Matsumoto Wako, Meguro Hiiro, Yamakawa Ui, Yamada Momomi
"Kogarashi wa Nakanai"
Artist: BACKS Members (BACKSメンバー)
- (Center: Taniguchi Airi)
- 2nd gen: Inoue Rina, Onuma Akiho, Kosaka Marino, Takemoto Yui, Masumoto Kira
- 3rd gen: Odakura Reina, Kojima Nagisa, Taniguchi Airi, Nakashima Yuzuki
External Links
- Special Website
- Oricon Profile: Limited Edition Type-A | Limited Edition Type-B | Limited Edition Type-C | Limited Edition Type-D | Regular Edition
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