Yakusoku (Eir Aoi song)

"Yakusoku" (約束, Promise) is a song by Japanese pop singer Eir Aoi. It was released on her official YouTube on February 8, 2018 as her comeback song from her hiatus,[1][2] before received a physical release together with the song "Ryūsei" on June 13, 2018 as her fourteenth single.[3] It reached number 8 on Oricon and number 10 on Japan Hot 100. The single mark as her first double A-side single.

"Yakusoku"
The regular edition cover
Single by Eir Aoi
from the album Fragment
A-side	"Ryūsei" (double A-side)
Released	June 13, 2018
Recorded	2018
Studio	Sony Music Studio (Tokyo, Japan)
Genre	J-pop
Length	4:47
Label	Sacra Music
Composer(s)	Ryosuke Shigenaga
Lyricist(s)	Eir Aoi, Ryosuke Shigenaga
Eir Aoi singles chronology
"Tsubasa" (2016) "Yakusoku" / "Ryūsei" (2018) "Iris" (2018)
Music video
約束(Youtube edit) on YouTube

Release and reception

On 8 February 2018, it was announced that she would resume her activities after her hiatus with the release of the music video "Yakusoku" (約束, Promise) on YouTube.[1][2] The song itself was released together with the song "Ryūsei" on June 13, 2018 as her fourteenth single on three edition; Regular edition, Limited edition and Limited anime edition.[3] The single reached number 8 on Oricon, and 10 on Japan Hot 100.[4][5] The song was featured in her fourth album "Fragment".[6]

Music video

The music video for "Yakusoku" was directed by Yūsuke Tanaka.[7] The video features a lyrics of the song with some footage of Eir Aoi with using blue jacket taking a photo session in the mountain,with some scene featuring a forest and also a mountain

Track listing

Regular edition

CD

No.	Title	Length
1.	"Ryūsei" (流星 Meteor)	4:13
2.	"Yakusoku" (約束 Promise)	4:47
3.	"Hitokakera no Yuuki" (ヒトカケラの勇気 A Piece of Courage)	3:52
4.	"Ryūsei" (流星 Meteor) (Instrumental)	4:11

Limited edition

CD

No.	Title	Length
1.	"Ryūsei" (流星 Meteor)	4:13
2.	"Yakusoku" (約束 Promise)	4:47
3.	"Hitokakera no Yuuki" (ヒトカケラの勇気 A Piece of Courage)	3:52
4.	"Ryūsei" (流星 Meteor) (Instrumental)	4:11

DVD

No.	Title	Length
1.	"Ryūsei" (music video)	4:11
2.	"Yakusoku" (music video)	4:45

Limited anime edition

CD

No.	Title	Length
1.	"Ryūsei" (流星 Meteor)	4:13
2.	"Yakusoku" (約束 Promise)	4:47
3.	"Hitokakera no Yuuki" (ヒトカケラの勇気 A Piece of Courage)	3:52
4.	"Ryūsei" (流星 Meteor) (Sword Art Online Alternative Gun Gale Online OP ver)	1:29

DVD

No.	Title	Length
1.	"Ryūsei" (Sword Art Online Alternative Gun Gale Online opening version without credit)	1:30

Personnel

Singer and bands

• Eir Aoi – vocals, lyrics ("Ryūsei", "Yakusoku")
• Kohei Tsunami, Ryosuke Shigenaga, Katsuhiko Kurosu – lyrics
• Ryosuke Shigenaga – Piano, arranger, other instruments
• Hiroki Arai - bass
• Takumi Sone – guitar
• Taro Yoshida – drums
• Tomoe Nakajima, Izumi Taniguchi, Nao Yamada - Violin, viola
• Kana Matsuo - Cello

Production

• Satoshi Morishige, Nobuyuki Fujiwara – record
• Kenichi Koga – mixer

Charts

Year	Chart	Peak position (shared with Ryūsei)
2017	Oricon[4]	10
	Japan Hot 100[5]	8

Release history

Region	Date	Label	Format	Catalog
Japan	13 June 2018	Sacra Music	CD	VVCL-1255
			CD+DVD	VVCL-1252
			CD+DVD	VVCL-1256

References

1. "Singer Eir Aoi Returns From Hiatus". Anime News Network. February 8, 2018. Archived from the original on February 8, 2018. Retrieved June 21, 2020.
2. ">藍井エイル、活動再開のお知らせ" (in Japanese). Sony Music Entertainment Japan. Archived from the original on February 7, 2018. Retrieved June 21, 2020.
3. "藍井エイル、14thシングル「流星 / 約束」6月13日（水）に発売決定！" (in Japanese). Sony Music Entertainment Japan. March 26, 2018. Archived from the original on March 28, 2018. Retrieved June 21, 2020.
4. "流星/約束" (in Japanese). Oricon. Retrieved June 21, 2020.
5. "流星 - Chart Insight" (in Japanese). Billboard Japan. Retrieved June 21, 2020.
6. "FRAGMENT" (in Japanese). Oricon. Retrieved June 21, 2020.
7. "SPACE SHOWER Music Video Search". SPACE SHOWER Networks Inc. Retrieved June 21, 2020. (in Japanese)