The Chinese plane had already left the islands – known as Diaoyu in China and Senkaku in Japan – by the time the Japanese F-15s arrived.
Although Japan's 2011 Fukushima Daiichi nuclear disaster set much of the public against nuclear power, politicians are not convinced.
A month or so after the government voted to end Japan’s nuclear power industry by the 2030s, Japan is contemplating putting more reactors online if a nuclear watchdog deems it safe, according to OilPrice.com.
The China and Japan face off over five islands has sunk relations to a 40-year low - the worst since diplomatic relations began. But the sabre rattling is just for show, say analysts.