This is the latest information of the promoter:
There are still immigration restrictions in Japan, for tourists from overseas travel is only allowed in escorted package tours to prevent the spread of the virus.
Ministry of Foreign Affairs of Japan, this institution is in charge to these tourist groups:
+81 3 5253 8111
Individual tourists may not enter Japan for the moment.
And last-but-not least please note that the promoter does not accept to cancel or refund sold tickets, no matter for what reason.