Detailed Explanation:

Answer: Option 2 — China and Japan engage in maritime disputes over these islands in East China Sea

The Senkaku Islands (called Diaoyu in China) are a group of uninhabited islands in the East China Sea that are at the center of a territorial dispute between Japan and China. Japan has administered these islands since 1972, but China also claims sovereignty over them, leading to ongoing maritime tensions between the two countries.

❌ Option 1 – Incorrect: The Senkaku Islands are natural islands in the East China Sea, not artificial islands in the South China Sea.
✅ Option 2 – Correct: This accurately describes the Japan-China territorial dispute over these islands in the East China Sea.
❌ Option 3 – Incorrect: There is no permanent American military base on the Senkaku Islands; they are uninhabited.
❌ Option 4 – Incorrect: The ICJ has not declared them as no man's land, and Southeast Asian countries are not claimants to these islands.

📝 Short Notes: Senkaku/Diaoyu Islands Dispute

• Location: East China Sea, approximately 120 nautical miles northeast of Taiwan
• Japanese name: Senkaku Islands; Chinese name: Diaoyu Islands
• Status: Group of 8 uninhabited islands and rocks covering about 7 sq km
• Current administration: Japan (since 1972, following reversion from US control)
• Dispute parties: Japan, China, and Taiwan all claim sovereignty
• Strategic importance: Located near important shipping lanes, rich fishing grounds, and potential oil and gas reserves
• Recent tensions: Frequent incursions by Chinese coast guard vessels into waters around the islands have increased since Japan's nationalization of three islands in 2012