 WeWise stands for Weather-Rise Mutant Individuation Support System, which is an ICT for rain-fed rice farmers. WeWise can provide relevant information for rain-fed rice cultivation such as optimum sowing timing and fertilizer application schedule. WeWise can also show yield predictions of different varieties that help the farmers to choose better one according to the type of income in rainy season. Users can access WeWise either through their laptop or a smartphone. Our targeted users are at first agriculture extension workers because they pay crucial role for agriculture development in developing countries. But WeWise can be accessible by farmers themselves, especially the situation right now during COVID-19 crisis, when we can't have a face-to-face consultation for the rice production in incoming seasons. Our work is funded by the Ministry of Agriculture, Forestry and Fisheries of Japan. We have started developing WeWise for Southeast Asia, particularly for Laos and Indonesia. We are also working for the Philippines and Madagascar. Among those countries, Indonesia is advancing in terms of maturity of WeWise. We have developed the database for many varieties, and we have done field validation in relevant provinces such as Central Java, North Matura and West Nusa Tenggaya. Working for field validation brought us many challenges, but we are able to achieve the goal and obtain results and proof of predictability of WeWise through collaborating with national partners like Indonesian Rice Research Center, Assessment Institute for Agriculture Technology, and our dear colleagues in those institutes and collaborating farmers in those provinces. We will hand over WeWise to Indonesian government before the project ends this year.