Senbei, alternatively spelled sembei, are a type of Japanese rice crackers. They come in various shapes, sizes, and flavors, usually savory but sometimes sweet. Senbei are often eaten with green tea as a casual snack and offered to visiting house guests as a courtesy refreshment.
Ever since my days of living in Hawaii many years ago, these have been a favorite of mine. In Kyoto you will encounter a wonderful variety.
On my recent trip I visited one shop that has been making and selling their senbei for over 150 years. As you exit Nijo-Jinja, turn left and walk towards Nijo Castle. It will be on your right on the corner of Omiya Dori and Oike Dori.