Quote Originally Posted by Amberion View Post
There is a link at the 1st or 2nd page i think to the statement SE made about it. They said that those items would not be available to be gained in ARR.
Its a list of discontinued content. If you noticed it has a list of the old Seasonal quests as those quests are discontinued, however the items are available when the new seasonal quests come out. So based on past practice since launch, I would think the Yukata would be made available during an upcoming summer event.

Also this statement:

Quote Originally Posted by Camate View Post
Greetings, everyone.

Due to the fact that we received a lot of requests to make the previous seasonal event rewards available again in the future, the development team decided to do just that. Moving forward we will continue to release seasonal event items from the past in addition to releasing brand-new ones.