I bought this big scotch egg at Onoya Beef in Kagurazaka the other day.
350yen per one scotch egg. It was big and delicious.
Here, I have added two restaurants with a good view along the Sumida River near Asakusa. Unagi Maekawa Komagata- Unagi(Eel)This restaurant is very close to the A5 exit of Asakusa station. The speciality is grilled eel. This restaurant faces Sumida