The UDX building is a large building in the heart of Akihabara. It’s supposedly a shopping mall complex. However, in reality, there aren’t many stores inside as it’s size suggests. There are places to eat, some Japanese animation stores, and some office spaces. I witnessed a large line of fans waiting at one level of the complex, so I asked people what was going on. Apparently, every so often, the UDX building serves as a base for selling famous people’s merchandise, autographs, and new toys/animation.