<Burkina Faso>
"Establishment of the model for fertilizing cultivation promotion using Burkina Faso phosphate rock in Burkina Faso" Using crop growth model to predict the effect of newly developed calcined phosphate rock fertilizer made from local materials under different environmental and management options. The purpose is to determine the usefulness of the fertilizer at country scale and give policy implication. (SATREPS Project, 2017-2021)

<Gambia>
"Evaluation of Socioeconomic Characteristics and Nutrient Management of the Growers of Fonio in the Gambia" Fonio is an underutilized and neglected crop recognized by FAO. This research aimed to elucidate the optimum fertilizer application scheme for this new crop, and give guidances to the pioneering farmers. (2018-2020)

<Tanzania>
"Elucidation of optimum resource allocation among irrigated paddy, rainfed lowland, and rainfed upland rice systems to realize stable rice supply" (Grants-in-Aid for Scientific Research 26520304, 2014-2019).