The Ninja Experience Cafe in Harajuku sounds like it would've been perfect - right on Takeshita-dori where you can go from shopping madness to ninja stealth in seconds! While we got our ninja fix in Takayama instead, this place's setup with the hanging scroll jumps and photo ops against that red balustrade sounds pretty epic.
Love that they let you explore Harajuku in full ninja gear - imagine doing your shopping while dressed as a ninja! That's the kind of only-in-Harajuku experience you can't really get anywhere else. Even if you look ridiculous, everyone's wearing something wild on Takeshita-dori anyway.