i google and find a agent in japan selling, but at a price of 72 usd if i not wrong. i did not buy as it far to expensive for me. My friend happen to be at japan and i got him to buy for me.
dun know why, the web site stated that 3 months before can buy, but when my friend is there , cannot. however the lawson guy is helpful to check and told him at a certain dates then can buy. ( it around 5 weeks prior to the visit).
When the open hour to purchase at 10am, he manage to get the date i want and by noon time , it all sold out .