Only the current version so far — new entries appear as the app ships updates.
和暦日付ウィジェット2 is a lifestyle app by cow with 10,000+ downloads (about 18K estimated). +78 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “It is a customizable widget application that displays date attribute information such as the Japanese calendar and Rokuyo. It can also be used as a monthly calendar.”