In the alley, you will always discover individually owned cozy shops, bars and restaurants. Harajyuku Dori, the back streets of Harajuku is like a maze and you will discover hidden, trendy spots here and there. Normally, residential housings are restored and remodelled to be used commercially.
Sakuratei Okonomiyaki house is one of my favorite enjoyable spots. They serve a wide range of unique okonomiyakis, monjyayaki, yakisoba, yakiudon and modernyaki in a funky atmosphere.
You cook your food by yourself on your own table but no worries, they have a cheat sheet and instructions so to speak.
A fun evening guaranteed.