I bought some ikameshi boxes as souvenir and enjoyed tasty rice stuffed squids at home. When you visit Onuma area by car, how about going a little further? It takes about 20 minutes or so from Onuma;-D
If you are interested in Ikameshi, please check this post of my other blog.
My husband ordered a salt taste ramen with chicken & shrimp dumplings, 地鶏えびわんたん麺(jidori ebi wang tang men), 930yen. This dish has two tastes and you are supposed to choose either salt or soy taste.
I believe they have only Japanese menu, but you can choose what you like judging by their appearances on the picture menu.
You can enlarge most of the pictures on this blog. ;D