I stumbled into this store for the first time just a couple of weeks ago. I have to say, it is the perfect place to stop in and pick up gifts before heading home for the holidays. It's also a great place to take out of town guests so they can do all their shopping for friends back home. They've got generic souvenirs like keychains and postcards, but they've also got sandals, bags made of kimono-style fabric, aprons emblazoned with the names of different brands of sake, and yukata.
The ladies who work in the store are originally from the Kyoto area and provide you with a lot of gift options indicative of that area. They are also extremely friendly and helpful.
This place is wonderful. I felt terrible for having lived in a tea-centered culture for so long and knowing so little about it. So one afternoon on a shopping trip I went into the store. The staff is fabulous, friendly, helpful, and passionate about tea. I learned a lot from them, and went back for a couple of tea making classes. Once you figure out what you like, you can start ordering for home delivery. This is really good if you live far out of the city and don't have a chance to get to Roppongi very often. I think it's also a good place to bring out of town visitors to learn more about tea.