It wasn't mentioned before in this thread, but Remioromen switched labels from SPEEDSTAR to OORONG RECORDS, which is affiliated with avex.
Starting with the "Yume no Tsubomi" single, that's when the catalog # first started with the avex #, FYI.
More info:
http://ja.wikipedia.org/wiki/OORONG_RECORDS
http://www.oorong-records.jp/artists/remioromen/
http://www.avex.co.jp/e_site/press/2009/081106.pdf
Also, CDJapan has added the "Starting Over" single for pre-order:
http://www.cdjapan.co.jp/detailview.html?KEY=AVCO-36014
First Press details: digipack and bonus track "Starting Over (Live ver. From Saitama Super Arena) (subject to change)