So the event is starting tomorrow March 20th 2019. Products will be available to buy from their online store starting April 4th but they do not ship outside of Japan.
We have a small update with regarding if you spend at least 2000 yen you can get the following postcard.
More info can be found here over on their twitter account.
We did make a post about this event a little while ago which can be found here.
If you want anything from this event can not go you can buy from their online store from 4th April (Japan Only) but I would recommend using FromJapan for the people who are living outside of Japan.