Only the current version so far — new entries appear as the app ships updates.
運行情報アラート - 周辺の運行情報を自動で確認して通知 is a maps & navigation app by sukorin with 1,000+ downloads (about 1.2K estimated). +1 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “This app automatically checks nearby routes and notifies you only when there are delays. Route settings and confirmation of operation information are automatic, so you don't need to open the app yourself, just wait for the notification.”