This post is about more than bento boxes. Japanese lunch (and sometimes dinner) is a lot of different food on one plate or tray. In Nagoya, I enjoyed flat noodles (in bowl on lefthand side) and pork miso (red miso, very strong, typical Nagoya style).
In Keio (outside of Tokyo), we enjoyed a salmon tray - notice the seaweed, rice, daikon and other radishes.
Bento box from Nagano lunch!
Bento box from Tochigi lunch!
Bento box from Tochigi dinner!
Bento box from Tokai!