The Asia Rice Crop Estimation and Monitoring (Asia-RiCE) initiative was launched by Asian space and agricultural agencies in 2012. The initiative promotes strengthening rice monitoring abilities through the use of remote sensing tools, and disseminating relevant, timely and accurate estimation of rice production. In this study, we develop a web-based system (JAXA's Satellite-based Monitoring Network system : JASMIN) to monitor the agrometeorological conditions of paddy areas in Southeastern Asia. JASMIN collects various satellite-derived agrometeorological data, provided by individual servers or websites, and then reprocesses the data spatially and temporally so that it can be used in the initiative. This system provides current and anomalous condition maps, as well as time-series chart in agrometeorological data such as soil moisture, solar radiation, Land Surface Temperature (LST), Normalized Difference Vegetation Index (NDVI), precipitation, and drought index, via the JASMIN website. This satellite-derived information, updated twice a month, is currently used to produce rice growth outlook for Indonesia, Thailand, Philippines, and Vietnam, as part of the Asia-RiCE initiative.