ダムナビ　日本全国ダム要覧 is an Android app developed by Mejiro Publications. It is a comprehensive guide to approximately 3,000 dams located across Japan. The app provides data on the water system, river name, construction method, purpose, size, total storage capacity, operator, and completion year for each dam. With sorting options such as by prefecture, construction method, and storage capacity, users can easily find the information they need. The app also includes location data for all dams, allowing users to view them on a map. Additionally, it offers a search and display function for dams near the user's current location. The app seamlessly integrates with the popular NaviCon app by DENSO, enabling users to send dam locations to their car navigation system. It is a must-have for anyone interested in exploring and visiting dams in Japan.