YouCha

Tiny but delightful shop specializing in Chinese teas. Bit pricey but you get to taste several different types of teas. The all female staff are friendly and are ready to answers all your questions about tea.

Excellent range of Chinese and Taiwanese tea leaves, even full bricks of puer. I love that the knowledgeable staff brews samples of teas you want so you can try them before buying. Rare find as buying these tea types is difficult in Japan.

I'd give more than 5 stars if I could. We went into the store to browse for tea leaves. What we got was a generous 20 minutes of the sales lady's time as she brewed several batches of tea to sample. We picked out the teas of interest to us, she recommended options, and happily brewed the samples. It was obvious she was a tea sommeliere who enjoyed sharing her knowledge.I had paid for reserved tea tasting elsewhere in Tokyo, but this one was essentially free. Some English spoken here.