23 is the third album from the Japanese duo, Rythem

Rythem

is a Japanese Pop/Singer-songwriter duo consisting of two female members, and . They are signed to Sony Music Japan. In addition to their vocals, Yui plays the piano while Yuka plays the guitar...

. It is set to be released on October 1, 2008 under their label, Sony Music Entertainment Japan. This album contains songs from their singles Hotarubi

Hotarubi (song)

is Rythem's twelfth single which was released on February 28, 2007 under Sony Music Entertainment Japan label. The title track was used as the ending theme for TV Tokyo's show FIGHTENSION☆SCHOOL...

, Bitter & Sweet, Kubisuji Line

Kubisuji Line

is Rythem's fourteenth single. It was released on February 20, 2008 under Sony Music Entertainment Japan label. The title track was used as the theme song for Nikkatsu Co. Ltd.'s film entitled Naoko. Aishikata was used as the campaign song for Nippon Travel Agency Co., Ltd.'s Akai Fuusen Sotsugyou...

and their recent single Love Call/Akari no Arika

Love Call

is Rythem's fifteenth single and the duo's first double-A side and collaboration single . It was released on July 23, 2008 under Sony Music Entertainment Japan label. Love Call is used as an ending theme for the Nippon TV's drama Sukkiri!! making this the group's second tie-in with the said drama...

.

This album comes up in a regular edition (AICL-1964) and a limited edition (AICL-1962) which will contain the PV for Love Call, Kubisuji Line, Bitter & Sweet, and some documentaries.

Track listing

1. 東京メトロガール / Tokyo Metro Girl
2. Love Call
   Love Call
   is Rythem's fifteenth single and the duo's first double-A side and collaboration single . It was released on July 23, 2008 under Sony Music Entertainment Japan label. Love Call is used as an ending theme for the Nippon TV's drama Sukkiri!! making this the group's second tie-in with the said drama...
   
    (RYTHEM with キマグレン)
3. 猫背 -original- / Nekoze -original-
4. 首すじライン / Kubisuji Line
   Kubisuji Line
   is Rythem's fourteenth single. It was released on February 20, 2008 under Sony Music Entertainment Japan label. The title track was used as the theme song for Nikkatsu Co. Ltd.'s film entitled Naoko. Aishikata was used as the campaign song for Nippon Travel Agency Co., Ltd.'s Akai Fuusen Sotsugyou...
   
   
5. 夏メロ / Natsu Mero
   Hotarubi (song)
   is Rythem's twelfth single which was released on February 28, 2007 under Sony Music Entertainment Japan label. The title track was used as the ending theme for TV Tokyo's show FIGHTENSION☆SCHOOL...
   
   
6. アイシカタ / Aishikata
   Kubisuji Line
   is Rythem's fourteenth single. It was released on February 20, 2008 under Sony Music Entertainment Japan label. The title track was used as the theme song for Nikkatsu Co. Ltd.'s film entitled Naoko. Aishikata was used as the campaign song for Nippon Travel Agency Co., Ltd.'s Akai Fuusen Sotsugyou...
   
   
7. SMILE
8. Joyful
9. Like a Friend
10. Bitter & Sweet
11. あかりのありか / Akari no Arika
    Love Call
    is Rythem's fifteenth single and the duo's first double-A side and collaboration single . It was released on July 23, 2008 under Sony Music Entertainment Japan label. Love Call is used as an ending theme for the Nippon TV's drama Sukkiri!! making this the group's second tie-in with the said drama...
    
    
12. ~Interlude~
13. Banana moon
14. Love Call (DAISHI DANCE REMIX)

DVD Track listing

1. Love Call PV
2. Kubisuji Line PV
3. Bitter & Sweet PV
4. "Arigatou! 1 Mannin Kanshasai" Live Digest
5. Recording documentaries

Charts and sales

Oricon Ranking (Weekly)	Sales
18	8,354