Via tokyohive:

BoA has announced that she will be releasing a new Japanese single next year! This will be her first Japanese single in about two and a half years.

BoA's anticipated single will be titled "Only One" and is slated for release on February 20th. It will include the Japanese version of "Only One" and "The Shadow", which were included in her latest Korean album, "Only One". Both songs are written and composed by BoA herself.

Check out the track list below!

===

<CD+DVD>

CD:
01. Only One
02. The Shadow
03. Only One(INST)
04. The Shadow(INST)
(Total of 4 versions for the 2 songs)

DVD:
01. Only One(Music Video)
02. The Shadow(Music Video)
03. Only One(Making Footage)
04. The Shadow(Making)
(Total 25 minutes)

-

<CD-Only>

CD:

01. Only One
02. The Shadow
03. Only One(INST)
04. The Shadow(INST)
(Total of 4 versions for the 2 songs)

===

Source: BoA's Official Website