Hey all! I found the credits to Kalen's last single!

作曲(composer)：菊池一仁 (kazuhito kikuchi) & 湯汲哲也 (tetsuya yukumi)
編曲(arrangement)：ats-

菊池一仁 (kazuhito kikuchi) also worked on:
・ayumi hamasaki (Depend on You/WHATEVER/SURREAL/HEAVEN)
・koda kumi (TAKE BACK/Trust your love)
・Every Little Thing (fragile/キヲク/宙 -そら-、響 -こえ-)
・TRF (BE FREE/embrace)
・EXILE (O'ver)
・alan(明日への讃歌/空唄/Diamond/Over the clouds)

湯汲哲也 (tetsuya yukumi) also worked on:
・ayumi hamasaki (ANGEL'S SONG/moments/JEWEL)
・momoiro kuroobaa Z (ツヨクツヨク -ZZ ver.)

ats- also worked on:
・ayumi hamasaki (Free&Easy/evolution/appears)
・Janne Da Arc (Mysterious)
・dream (I love dream world-世界中のしあわせを歌おう/Everlasting Snow)
・V6 (Bouquet/Orange "musicmind ver")
・BoA (Winter Love)
・AAA (Overdrive/Departures/WOW WOW WAR TONIGHT)

Oh I really like the picture! She gets a lot of important tie-ins. Avex really has faith in her it seems

of course! もちろんよー

Thank you for sharing! I will write an english translation. シェアーしてれくれてありがとうございます。英語に訳させていただきます：

Tower Records has chosen to collaborate with Kalen Anzai to promote their membership programme and to raise awareness. There will be several posters in the series which are to be shown in the various music stores entitled "ki ni naru ano ko" (that girl that everyone wants to know more about").
The first poster is now released and celebrated the ''available for free' single'-Jinsei wa senjoo da' and its special 8-cm physical release at the tower records shops. From the first of October, these posters will be shown in shops throughout the country as well at TOWERmini.
The company will also collaborate with other artists in their "Ki ni naru ano ko"-series.

ENGLISH VERSION BELOW
タワーレコードメンバーズ撮り下ろしポスター企画 シリーズ第5弾アーティストに安斉かれんが登場

タワーレコードでは、店舗とオンラインショップ（http://tower.jp/）共通のメンバーシップサービス「タワーレコードメンバーズ」の認知向上を目的に、タワーレコードが選ぶ「気になるあの子」をテーマにアーティストとのコラボ・ポスターをシリーズで掲出する施策を実施しています。

今回、その第5弾として10月23日（水）にタワーレコード限定で3rdシングル「人生は戦場だ」を無料で8cmSGリリースする安斉かれんが登場。10月1日（火）より、全国のタワーレコード、TOWERminiにて、撮り下ろしのポスターを掲出します。

タワーレコードでは、今後も定期的に、アーティスト、女優、モデル、タレントなど様々な「気になるあの子」とのコラボレーションを展開していきます。

credits: @sepia_phantom from twitter

Tower Records has chosen to collaborate with Kalen Anzai to promote their membership programme and to raise awareness. There will be several posters in the series which are to be shown in the various music stores entitled "ki ni naru ano ko" (that girl that everyone wants to know more about").
The first poster is now released and celebrated the ''available for free' single'-Jinsei wa senjoo da' and its special 8-cm physical release at the tower records shops. From the first of October, these posters will be shown in shops throughout the country as well at TOWERmini.
The company will also collaborate with other artists in their "Ki ni naru ano ko"-series.
(english translation by Rody)


credits: tower records公式サイト