Warner Music Japan (WMJ) said today that its catalog is now available on the iTunes Japan Music Store, leaving Sony Music Entertainment (Japan) as the only major Japanese label not to have licensed its repertoire to iTunes.

With effect from today, WMJ's iTunes launch will feature an exclusive world premiere of female vocalist Ayaka's new video for her recently released single, "Jewelry Day."

"We're delighted to make the Warner Japan catalog available on the iTunes Store for the first time," said Warner Music Asia Pacific president Lachie Rutherford in a statement. "We're proud to be marking the event with exclusive content from some of our most exciting acts and look forward to music fans being able to download their favorite Warner artists from iTunes."

Said iTunes VP Eddie Cue in a statement: "iTunes is the most popular online music store in the world, and now we have an incredible catalog of over four million songs available to music fans in Japan. We continually strive to offer the best selection of music and are thrilled to bring Warner Music Japan's extensive catalog to the iTunes Store."