my wife found a walking tour off of AirBnB since the app had a lot of good info on local things to do and places to eat.The tour ended up being myself, my wife, and a guy from Hokkaido who had just moved to Japan from China.
A woman named Fumino was our guide. She was born in Hiroshima, but grew up in Saito. She knew a ton about the area and it sounded like she went to college in the area.
We walked all over Shibuya, and ended up getting an awesome map of all the sights in the city we hadn't been able to find before.