Leaders from Japan and African nations on Sunday said the ongoing Russian war in Ukraine has caused a food crisis on the fast-growing continent, without referring to Moscow by name.

"We underscore with deep concern the negative socio-economic impact of this (Ukraine) crisis, which has created food insecurity in Africa in the challenging context" of the post-COVID era, the leaders said in the Tunis Declaration issued following the Tokyo International Conference on African Development held in the Tunisian capital.

The leaders also affirmed the importance of "sound development finance adhering to international rules and standards" to spur sustainable growth in Africa, where China is increasing its clout through investment and development aid.