JM-Weather is a free weather oceanographic information app developed by Japan Radio Co. Ltd. for Android users. It is designed to provide users with essential weather information and forecasts to ensure their safety and security while at sea. The app features a transition and forecast weather map, including typhoon information, which is updated every 24 to 48 hours. It also displays weather sea conditions information, such as rainfall, wind speed and direction, wave height, period, wave direction, and typhoons information. With JM-Weather, you can also display a sea warning and marine forecast.

The app's "precipitation nowcasting information" feature provides updated information every five minutes, which is useful for those who use it on land and need to be aware of heavy rain. JM-Weather provides a heads-up display to help users understand the direction in which they are traveling, making it easy to maneuver. The app is easy to use, with a simple interface that allows users to access all necessary information in one place.