User blog comment:JsA1/Reasons why i think Morning Musume sales are rising/@comment-131168-20130727113835

I wonder how far the edition thing can go. Looking just at MM singles...

2003-07: First limited edition. 2006-11: First with two limited editions. 2009-08: First with three limited editions. 2011-04: First with four limited editions. 2012-04: First with five limited editions. 2012-07: First with six limited editions. 2013-01: First with six limited editions plus a second regular edition.