ER2 (Kanjani Eight song)

{{Infobox song

| name = Omoidama

| cover =

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| type = single

| artist = Kanjani Eight

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| released = {{Start date|2014|08|06}} (Japan)

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| prev_title = Omoidama

| prev_year = 2014

| next_title = Ittajanaika/CloveR

| next_year = 2014

}}

"ER2" is a single by Japanese boy band Kanjani Eight as Eight Ranger. It was released on August 6, 2014. It debuted in number one on the weekly Oricon Singles Chart{{cite web|url= http://www.oricon.co.jp/rank/js/w/2014-08-18/|title= 2014年08月04日～2014年08月10日のCDシングル週間ランキング（2014年08月18日付）|work= Oricon Style|publisher= Oricon|accessdate= October 12, 2014|language= Japanese}} and reached number one on the Billboard Japan Hot 100.{{cite web|url= http://www.billboard-japan.com/charts/detail?a=hot100&year=2014&month=08&day=18|title= Billboard Japan Hot 100 2014/08/18|work= Billboard Japan|language= Japanese|accessdate= October 12, 2014}} It was the 27th best-selling single of 2014 in Japan, with 241,824 copies.{{cite web|url= http://www.tokyohive.com/article/2014/12/2014-oricon-yearly-single-ranking-top50|title= 2014 Oricon Yearly Single Ranking TOP50|work= toykohive|publisher= 6Theory Media, LLC.|date= December 20, 2014|accessdate= January 9, 2015}}