What is the unusual “Tomita Go” location near Toji Temple?

Hello and thank you for reading.

I passed through Kyoto a while ago and encountered an unusual location at night. It is at the intersection of Omiya Tojimichi and Inokuma-Dori. The location has unusual writing all over the walls and flies American flags.

I tried to find information on it online elsewhere but can find nothing. Can any Kyoto locals explain what it is? Thank you!