Only the current version so far — new entries appear as the app ships updates.
熱中症アラート(暑さ指数予測) is a weather app by Roku inc. with 50+ downloads (about 76 estimated). +5 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “Check the nationwide heat index (WBGT) up to 7 days in advance without registering as a member. Take proactive measures against heatstroke with a risk map and 3-hour advance notifications for your favorite locations.”