The seasoning features a blend of dried seaweed (nori), Japanese cherry blossoms (sakura), and salt and can be bought in a small packet to shake onto your fries for 30 yen (~25 cents US).
The seasoning has been available since the end of March (I caught this a little late) and will be available through early May, while supplies last. They were introduced along with teriyaki burgers.
Cherry blossoms are a popular flavor in Japan during the spring when they bloom.
