While energy accessibility in East Africa is still low, global agenda on energy transition brings African countries moving towards increasing green energy supply such as solar and wind power. East African countries are cooperating in the energy sector to improve energy access and power generation through EAC Vision 2050 and EAPP. One of the key message of those policies is that diversifying energy mix by increasing the share of green energy is essential. For this reason, Korea and East African countries could cooperate on improving policy environment on the energy sector, scaling up green energy projects, diversifying the energy cooperation, and promoting private sector to enter East African market.