The group debuted in the Japanese market after only two years since their Korean debut to further spread their activities and challenge themselves outside of Korea.[3] They released their Japanese single "Kokoro", alongside multiple versions, including one with all members and five featuring each member individually.[4]
Their lead track, "Kokoro" debuted at the 5th spot on the Oricon chart, and moved to 3rd spot the next day.[5] It was also chosen as an ending theme song for an anime entitled Blue Dragon.[6]
Track listing
No.
Title
Lyrics
Music
Arrangement
Length
1.
"Kokoro"
SPIN
本間昭光
中村太知
2.
"Be A Star"
SPIN
田中直
田中直
3.
"Alice"
松井五郎
野井洋児(Yoji Noi)
大西響太
4.
"Kokoro" (Inst.)
本間昭光
5.
"Be A Star" (Inst.)
田中直
6.
"Alice" (Inst.)
野井洋児(Yoji Noi)
NOTE: For the limited editions, "Alice" and its instrumental version are replaced by the solo song and its instrumental version of each member.