Originally Posted by JALPak

http://www.jal.co.jp/dom/waribiki/jmb_pre/#jgc

Sakitoku and Super Sakitoku tickets for travel between July 1 and Sep 30 2011 will go on sale at 09:30 on May 1. As a valuable JMB FLY ON status, JAL Global Club, and JAL Mileage Bank member, you will be able to take advantage of this sale before the general public!

For JMB FLY ON elites and JGC members, the sale will start even earlier (sorry can't login to Japanese site to find out the time)
For JALCard members, you can purchase the ticket from 14:00 on Apr 29 2011
For Japan JMB members, you can purchase the ticket from 11:00 on Apr 30 2011