Romanised As "Charan-Po-Rantan". Formed In Tokyo In 2009 Charan-Po-Rantan チャラン・ポ・ランタン Is Sister Duo Of Koharu Accordion And Momo Vocals . They Often Collaborate With CanCan Balkan. In July 2014 They Made Their Major Debut On The Label Avex Trax With The Single "Wasurekaketa Monogatari'.