Yes, Kikyouya Shingen is popular in Japan, and the Kikyouya Shingen Mochi Popsicle tastes very good as well. However, the candy version did not live up to my expectations. The most essential part is the mochi, but the texture was ruined in exchange for shelf-life longevity. The package cost $2.99 for 16 candies, which is a convenient way for the taste of Kikyouya Shingen. That’s about the only value I see in these candies. I don’t really recommend them.
Nana’s Green Tea is a very good matcha dessert shop. They lived up to their name, everything related to matcha has a rich taste to it. It is well controlled so it doesn’t taste bitter. The cost of $8 per person on average is a little high, but their premium matcha is from Kyoto. It is very authentic and nothing is watered down. Please note that they also serve Hojicha dessert, ramen, and Donburi. I would definitely recommend Nana’s Green Tea.
Hokkaido Butter is really not in the leagues of other famous pre-packaged frozen desserts. The $9.99 package contain 4 ice cream cones inside, so they are $2.50 each. That is pretty expensive. I believe the careless temperature control during transportation ruined my first bite and the waffle texture. I cannot recommend something that is expensive and has low quality.