Soak dried wakame in plenty of water until rehydrated, then drain.

Pat the aburaage with a paper towel to remove excess oil, then cut it into smaller pieces (half the short side, then quarter the long side).

In a microwave-safe container, combine aburaage, canned tuna, wakame, and seasonings. Lightly mix, cover loosely with plastic wrap, and microwave at 600W for 2 minutes and 30 seconds.