You can buy this bentô (box lunch) at Tôkyô station, on the departure platform of the Shinkansen (Japanese inter-city high-speed "bullet" trains), decorated with the actor Nakamura Utaemon III playing the role of the warrior Kumagai Jirô Naozane in the "Kumagai Jin'ya" scene of the play "Ichi-no-Tani Futaba Gunki".