Only the current version so far — new entries appear as the app ships updates.
和暦日付ウィジェット is a tools app by cow with 10,000+ downloads (about 48K estimated). +70 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “Japanese calendar date widget is a simple date widget.
Format customization freedom is social position.”