:Best Friend (Kana Nishino song)

{{Use mdy dates|date=July 2020}}

{{more citations needed|date=March 2010}}

{{Infobox song

| name = Best Friend

| cover = Best Friend - Kana Nishino cover.jpg

| alt =

| type = single

| artist = Kana Nishino

| album = To Love

| B-side = {{ubl|"One Way Love"|"Kon'ya wa Party Up"}}

| released = {{start date|2010|02|24}}

| recorded =

| studio =

| venue =

| genre = J-pop

| length =

| label = SME Records

| writer = Kana Nishino, Giorgio Cancemi

| producer =

| prev_title = Dear…/Maybe

| prev_year = 2009

| next_title = Aitakute Aitakute

| next_year = 2010

}}

"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.{{cite web|script-title=ja:レコード協会調べ 9月度有料音楽配信認定＜略称：9月度認定＞ |trans-title=Record Association report: September digital music download certifications (Abbreviation: September Certifications) |url=http://www.riaj.or.jp/data/others/chart/w101020.html |work=RIAJ |language=Japanese |date=October 20, 2010 |accessdate=April 20, 2011 |url-status=dead |archiveurl=https://web.archive.org/web/20130915153303/http://www.riaj.or.jp/data/others/chart/w101020.html |archivedate=September 15, 2013 }}{{cite web | script-title=ja:レコード協会調べ 3月度有料音楽配信認定＜略称：3月度認定＞ |trans-title=Record Association report: March digital music download certifications (Abbreviation: March Certifications) | url=http://www.riaj.or.jp/data/others/chart/w110420.html | work=RIAJ |language=Japanese | date=April 20, 2011 | accessdate=April 20, 2011}}