Zhōng Rì liǎng guó jiù Diàoyúdǎolièdǎo de zhǔquán cúnzài zhēngyì.
China and Japan have a sovereignty dispute over the Diaoyu Islands.
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Known as 钓鱼岛 (Diaoyu, 'Fishing Islands') in Chinese and 尖閣諸島 (Senkaku, 'Sharp Pavilion Islands') in Japanese. The islands are administered by Japan but claimed by both the PRC and the ROC (Taiwan), making the name you choose politically charged.