All Nippon Airways Flight 533, registration JA8658, was a NAMC YS-11 en route from Osaka, Japan, to Matsuyama on the island of Shikoku.

It was the fifth crash in Japan in 1966 and the second one experienced by All Nippon Airways that year, the first being the loss of Flight 60 on February 4.

On its final approach, the plane was higher than normal and touched down 460 metres beyond the runway threshold.

The plane reached a height of 70–100 metres, turned left, lost altitude, and crashed into the Seto Inland Sea at approximately 20:30.

As of 2024, Flight 533 continues to operate, but now it flies from Haneda to Takamatsu, utilizing an Airbus A321neo aircraft.