If there was a tea heaven, this place is it. I made the trek to the Ito En flagship store after become addicted to their Dong Ding oolong at Amai. The staff was incredibly sweet, knowledgeable and helpful. They offered assistance but gave me plenty of space so I could browse their museum-like teaware displays. I wound up with three onces of Dong Ding, pricey but so very worth it. Two cute little cups followed me home as well. They go perfectly with the funky kyusu that I ordered from Hibiki-an.
