Only the current version so far — new entries appear as the app ships updates.
郵便番号簡単検索 is a tools app by michiharu_s with 100,000+ downloads (about 125K estimated). +84 installs in the last 7 days. Released Jan 20, 2015. Install growth, rank history, SDKs and ad networks.
From the store listing: “Decision version of the zip code search app that examine the easily zip code with a simple operation! !
This app I can also be used in any place offline!”