If you have a samurai spirit, you can be samurai in Shinjuku 新宿 Tokyo.
Do you want to buy or rent Japanese traditional armor and arms?
It is located in Akihabara 秋葉原 (not Shinjuku 新宿) in Tokyo
Website (in Japanese)
This place is located near Akihabara 秋葉原 Station in Tokyo.
Are you interested in cosplay?
How about Ninja / Kimono / Robot restaurants in Tokyo?