"Best Friend" is a song by Japanese singer-songwriter Kana Nishino.

It was released as a single on February 24, 2010 by her record label SME Records.

The song has been certified as being downloaded as a ringtone one million times, and as a full-length download to cellphones 750,000 times.

This 2010s Japanese single-related article is a stub.

You can help Wikipedia by expanding it.