CLUB SANSEIDO is a free Android application developed by SANSEIDO BOOK STORE. It is a membership card application designed for members of "Club Sanseido" - the members' service of Sanseido bookstores. The app provides an overview of membership information, which can be used in place of a physical membership card when purchasing items at any outlet of SANSEIDO BOOKSTORE LTD by simply showing the barcode screen on the app.

The app has a new feature set to be introduced this April. The update will include a reference function for purchase history, a status-check function for the 'speed-order' services available at Sanseido bookstores, and a menu screen that allows access to each particular function. With this new feature, members can easily check their purchase history and the status of their orders with the app, making it more convenient to use.