Only the current version so far — new entries appear as the app ships updates.
JPZipAddress - オフライン郵便番号検索 is a tools app by M.Ito soft with 10,000+ downloads (about 13K estimated). +8 installs in the last 7 days. Released Jul 28, 2015. Install growth, rank history, SDKs and ad networks.
From the store listing: “It is an application that searches postal codes from keywords and searches addresses from zip codes.
After downloading data for search, you can search offline.”