Creative Space 8/ (Hachi) is one of my favorite art space where you can experience different kinds of art all in one location. The name, Creative Space 8/ (Hachi) , comes from the fact that 1) it's located on 8F and also 2) there are 8 different art sections within hachi.
The main section is normally used for events, and the rest is usually temporary galleries.
There was samurai, manga, and some ceramics when I visited recently. There is also a shop where you can buy local products from country side of Japan like miso, fruit juice etc. and you can easily spend a few hours here, enjoying contemporary art.
Shibuya Hikarie is connected to Shibuya station, so it's pretty convenient and I'd recommend stopping by when you're in the area and have a a few hours in between.