Unhappy Birthday Koubun

Limited Edition Type-A Cover

Limited Edition Type-B Cover

Limited Edition Type-C Cover

Limited Edition Type-D Cover

Regular Edition Cover

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

1. Unhappy birthday Koubun (Unhappy birthday構文)
2. Alter ego
3. Kogarashi wa Nakanai (木枯らしは泣かない; The Cold Wind Doesn't Cry)
4. Unhappy birthday Koubun -OFF VOCAL ver.-
5. Alter ego -OFF VOCAL ver.-
6. Kogarashi wa Nakanai -OFF VOCAL ver.-

Limited Edition Type-A Blu-ray Tracklist

12th Single BACKS LIVE!! ~Center Performance Collections~ <Part 1>

1. Minatoku Parsley (港区パセリ)
2. Utsukushiki Nervous (美しきNervous)
3. Koi ga Zetsumetsu Suru Hi (恋が絶滅する日)
4. Anthem time
5. Koi wa Muitenai (恋は向いてない)
6. 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

1. Unhappy birthday Koubun (Unhappy birthday構文)
2. Alter ego
3. Aozora ga Mieru Made (青空が見えるまで; Until the Blue Sky Appears)
4. Unhappy birthday Koubun -OFF VOCAL ver.-
5. Alter ego -OFF VOCAL ver.-
6. Aozora ga Mieru Made -OFF VOCAL ver.-

Limited Edition Type-B Blu-ray Tracklist

12th Single BACKS LIVE!! ~Center Performance Collections~ <Part 2>

1. Moshika Shitara Shinjitsu (もしかしたら真実
2. Blue Moon Kiss (ブルームーンキス)
3. Cool
4. Nakasete Hold me tight! (泣かせて　Hold me tight!)
5. Kimi no Koto wo Omoi Nagara (君のことを想いながら)

Limited Edition Type-C CD Tracklist

1. Unhappy birthday Koubun (Unhappy birthday構文)
2. Alter ego
3. I will be
4. Unhappy birthday Koubun -OFF VOCAL ver.-
5. Alter ego -OFF VOCAL ver.-
6. 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>)

1. OPENING
2. Tokugi Hirou (特技披露; Showing Off Special Skills)
3. Shifuku Fashion Show (私服ファッションショー; Casual Fashion Show)

Limited Edition Type-D CD Tracklist

1. Unhappy birthday Koubun (Unhappy birthday構文)
2. Alter ego
3. Buddies (English Version)
4. Unhappy birthday Koubun -OFF VOCAL ver.-
5. Alter ego -OFF VOCAL ver.-
6. 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>)

1. OPENING VTR
2. Overture
3. DANCE TRACK
4. Jigoujitoku (自業自得)
5. Drone Senkai Chuu (ドローン旋回中)
6. Shindafuri (死んだふり)
7. VTR
8. Shijima no Bouryoku (静寂の暴力)
9. I want tomorrow to come
10. Sakurazaka no Uta (櫻坂の詩)

Regular Edition CD Tracklist

1. Unhappy birthday Koubun (Unhappy birthday構文)
2. Alter ego
3. 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)
4. Unhappy birthday Koubun -OFF VOCAL ver.-
5. Alter ego -OFF VOCAL ver.-
6. 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

Sakurazaka46 promoting the single

"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