What is "futarigoto"

is a song by Japanese rock band Radwimps, released on May 17, 2006, as the first of three singles from the band's fourth album, Radwimps 4: Okazu no Gohan.

The song was first certified gold by the Recording Industry Association of Japan as a full-length cellphone download a year and a seven months after its release, followed by a platinum certification a year and four months later. As of May 2011, it is the only Radwimps song to receive a platinum certification.