Where to buy tea and sushi equipment?

Anyone who can recommend a place where I can buy japanese tea, especially sencha.

I'm also looking for equipment for making sushi when I'm coming home. Any store?
Orientel Bazar in Omotesando?

In Yanaka there's a brilliant tea shop that sells a wide range of tea, canisters and other wares.
"Kane Kichien
Located about halfway down Yanaka Ginza on the left at 3-11-10 Yanaka (tel. 03/3823-0015), it sells varieties of tea at the counter toward the back. With all the reported benefits of green tea, you probably know someone who might appreciate a small gift from this store. It's open Monday to Saturday from 10am to 7:30pm."

http://www.yanakaginza.com/shop/kanekichien/

The main equipment you need for making sushi is a good knife. Here are some recommended knife shops:
http://whereintokyo.com/dbinx/gourmet.html#japaneseknives

If you go to Kappabashi you can also find wooden trays for sushi, bamboo mats for rolling, etc.

Kappabashi has everything and anything kitchen related.