power ranger toys

Does anyone know any toys store that sell power ranger (super sentai) such as bokenger, gekiranger, or aba ranger toys in tokyo? I will take my 6 years old son to tokyo next month and he wants to buy things like this. Last year I visit Bandai museum but heard that it's closed down already. Please recommend places like this or any other interesting place for my son to see. But not Tokyo disney land. Thanks

This 6 floor toy store near the Ueno stop on the Yamanote loop line is awesome. Any kid will love it.
.

http://www.e-yamashiroya.com/

It's only in japanese but the pitures guve you an idea what to expect.