I found out about Hanaichie from a television program.
They are similar to the place V told me about in Kyoto as well as the one that I like from Kanazawa.
Their main shop is in Azabujuban, but I also found a kiosk at the Daimaru near Tokyo station.
When we went to Kyoto in December, I gave some to MIL.
This particular one has Asakusa nori (laver) in it.
Put some rice into a bowl.
Break it up and then pour some hot water or hot tea over it.
Delicious.
Hanaichie
Daimaru Tokyo, B1