Under17 Explained

UNDER17
Background:	group_or_band
Alias:	Poly-Phonic
Origin:	Tokyo, Japan
Years Active:	2001–2004
Label:	Lantis
Past Members:	Haruko Momoi Masaya Koike

Under17 (stylized as UNDER17) was a Japanese musical duo formed in 2001 by Haruko Momoi and Masaya Koike.^[1] The group was known for producing music known colloquially as " songs",^[2] providing theme and insert songs to series such as Tenbatsu! Angel Rabbie, Popotan, and DearS.

History

Some of the anime series where Under17 songs have been featured are Mouse, Popotan, Tenbatsu! Angel Rabbie, Hourglass of Summer, DearS, and Kujibiki Unbalance.^[2] This group has released several adult videogames' opening songs. On 27 September 2004, it was announced that Under17 would break up after their national tour, with Momoi and Koike going separate ways due to creative differences. Their final concert was held on 20 November 2004 at the Yokohama Blitz.^[3] Momoi officially embarked on a solo career and Koike formed the band MOSAIC.WAV.

The band reunited for one song on 31 August 2008 during the Animelo Summer Live, performing "Tenbatsu! Angel Rabbie" with the members of MOSAIC.WAV.^[4]

Momoi and Koike briefly reunited again in March 2020 to perform at the event Susume Moe Denpa Shōnen!! Daifukkatsusai 2020!!: Sugisarishi Moe o Motomete.^{[5] [6]}

Members

• (vocals)
• (guitar)

Discography

Compilation albums

Title	Year	Details	Peak chart positions	Sales
			JPN ^[7]		Web site: UNDER17 BEST ALBUM1 美少女ゲームソングに愛を! . ja . . 2020-10-06. Under17 Best Album 2: Moe Song o Kiwameruzo!: Web site: UNDER17 BEST ALBUM2 萌えソングをきわめるゾ! . ja . . 2020-10-06. Under17 Best Album 3: Soshite Densetsu e...: Web site: UNDER17 BEST ALBUM3 そして伝説へ… . ja . . 2020-10-06.
	2003	Released: 3 December 2003 Label: Lantis Formats: CD	93	-
	2004	Released: 21 January 2004 Label: Lantis Formats: CD	50	-
		Released: 22 December 2004 Label: Lantis Formats: CD	55	-
"—" denotes releases that did not chart or were not released in that region.

Singles

Title	Year	Peak position	Sales
		JPN ^[8]
	2003	68	-
		-	-
	2004	55	-
		68	-
"—" denotes releases that did not chart or were not released in that region.

Notes and References

1. Web site: 2009-05-14. FanimeCon 2009 Announces Halko Momoi (Musician, Songwriter, & Seiyū) as a Guest of Honor. 2009-05-22. Anime News Network.
2. Web site: 2004-06-08. RJP-Pro . 2009-05-22. Anime News Network.
3. Web site: 23 October 2005. アニメ. dead. https://web.archive.org/web/20070331231638/http://anime.excite.co.jp/interview/momoi_haruko01.html. 2007-03-31. 2020-10-01. Exciteエキサイト. ja.
4. Web site: MOSAIC.WAV & UNDER17 Tenbatsu! Angel Rabbie (Live). 2009-07-29. 2014-08-21. 26 August 2014. https://web.archive.org/web/20140826115610/http://www.dailymotion.com/video/x9zr6g_mosaic-wav-under17-tenbatsu-angel-r_music. dead.
5. News: 桃井はるこ×小池雅也のUNDER17が15年半ぶり復活、でんぱ組.incらと競演 . Haruko Momoi and Masaya Koike return as Under17 after 15.5 years, a recital contest with Dempagumi.inc . ja . . 2020-01-01 . 2020-10-05.
6. News: 16年ぶり復活…伝説の萌えソングユニット「UNDER17」がオタク文化に残した功績 桃井はるこ【インタビュー】 . (Interview) Haruko Momoi: a return after 16 years... the legendary Japanese: [[Moe (slang)|moe]] song unit Under17, an achievement remaining from the Japanese: [[otaku]] culture . ja . Anime! Anime! . 2020-03-13 . 2020-10-05.
7. Peak chart positions on the Oricon Weekly Albums Chart:
   • Under17 Best Album 1: Bishōjo Game Song ni Ai o
8. Peak chart positions on the Oricon Weekly Singles Chart:
   • "Mouse Chu Mouse": Web site: マウス Chu マウス . ja . . 2020-10-06.
   • "Popotan E.P.": Web site: ぽぽたんe.p. . ja . . 2020-10-06.
   • "Love Slave": Web site: ラブスレイブ . ja . . 2020-10-06.
   • "Kujibiki Unbalance": Web site: くじびきアンバランス . ja . . 2020-10-06.