Sandwiches with azuki (or adzuki) beans and butter on toast is a popular item on menus in the area between Tokyo and Osaka. It sometimes goes by the name of Ogura Toast 小倉トースト or Shiruko Sandwich しるこサンド when it is in biscuit form. KitKat calls it Azuki Sandwich flavor and sells this exclusively in the Tokai and Hokuriku regions. ネスレ キットカット あずきサンド
Photo is a web capture for explanatory purposes, copyright belongs to the company.