UMJ says the third single by an anonymous quartet of Japanese medical students has become the first full-track mobile download anywhere in the world to sell a million copies.

The milestone belongs to Aiuta (Love Song) by GreeeeN. The track was released on May 16th as a full-track download for mobile and its popularity spread through Internet, radio and word-of-mouth.

In addition to the million-selling full-track format, Aiuta is available as a ringtone, videotone and ringback tone. The song's sales to date across all digital platforms exceed three million.

Kazuhiko Koike, president and COO of Universal Music Japan, said: "We were convinced that Aiuta would have universal appeal the moment we first heard it.  We are very gratified that the song has become so popular through a very personal communication tool like the mobile phone."

GreeeeN's first album, A Domo Hajimemashite (Hi, How Do You Do?) has sold 550,000 copies since its release on June 27th.