Seishun Dokei

"Seishun Dokei" (青春時計) is the first single by Japanese idol girl group NGT48. It was released on April 12, 2017.[1] It reached number-one on the weekly Oricon Singles Chart with 160,271 copies sold.[2][3] It was also number-one on the Billboard Japan Hot 100.[4]

"Seishun Dokei"
Cover of the regular edition.
Single by NGT48
A-side	"Seishun Dokei"
Released	12 April 2017
Genre	J-pop
Label	Ariola Japan
NGT48 singles chronology
"Seishun Dokei" (2017) "Sekai wa Doko Made Aozora na no ka?" (2017)
Music video
"Seishun Dokei" on YouTube

Track listing

Regular Edition[5]

No.	Title	Length
1.	"Seishun Dokei" (青春時計)
2.	"空き缶パンク"
3.	"下の名で呼べたのは…"
4.	"Seishun Dokei -off vocal version-" (青春時計 -off vocal version-)
5.	"空き缶パンク -off vocal version-"
6.	"下の名で呼べたのは… -off vocal version-"

Type A[1]

No.	Title	Length
1.	"Seishun Dokei" (青春時計)
2.	"空き缶パンク"
3.	"出陣"
4.	"Seishun Dokei -off vocal version-" (青春時計 -off vocal version-)
5.	"空き缶パンク -off vocal version-"
6.	"出陣 -off vocal version-"

Type B[6]

No.	Title	Length
1.	"Seishun Dokei" (青春時計)
2.	"空き缶パンク"
3.	"純情よろしく"
4.	"Seishun Dokei -off vocal version-" (青春時計 -off vocal version-)
5.	"空き缶パンク -off vocal version-"
6.	"純情よろしく -off vocal version-"

Type C[7]

No.	Title	Length
1.	"Seishun Dokei" (青春時計)
2.	"空き缶パンク"
3.	"暗闇求む"
4.	"Seishun Dokei -off vocal version-" (青春時計 -off vocal version-)
5.	"空き缶パンク -off vocal version-"
6.	"暗闇求む -off vocal version-"

Chart performance

Oricon

Chart	Peak	Debut Sales	Sales Total
Weekly Singles Chart	1[1]	160,271[3]	207,626

Billboard Japan

Chart	Peak
Japan Hot 100	1[4]
Radio Songs	25[8]
Top Singles Sales	1[9]

References

1. "青春時計(TypeA)". Oricon News (in Japanese). Oricon. Retrieved 20 April 2017.
2. "週間 CDシングルランキング 2017年04月24日付". Oricon News (in Japanese). Oricon. Retrieved 20 April 2017.
3. "Oricon Weekly Charts for 4/10 ~ 04/16". tokyohive. 6Theory Media, LLC. 19 April 2017. Retrieved 20 April 2017.
4. "Billboard Japan Hot 100 2017年4月24日". billboard-japan.com (in Japanese). Billboard Japan. Retrieved 20 April 2017.
5. "青春時計". Oricon News (in Japanese). Oricon. Retrieved 20 April 2017.
6. "青春時計(TypeB)". Oricon News (in Japanese). Oricon. Retrieved 20 April 2017.
7. "青春時計(TypeC)". Oricon News (in Japanese). Oricon. Retrieved 20 April 2017.
8. "Radio Songs 2017年4月24日". billboard-japan.com (in Japanese). Billboard Japan. Archived from the original on 21 April 2017. Retrieved 20 April 2017.
9. "Top Singles Sales 2017年4月24日". billboard-japan.com (in Japanese). Billboard Japan. Retrieved 20 April 2017.