How much is the flight ticket from Shanghai to Japan?

It depends on where in Japan you want to fly. The fares in different places will definitely be different.

Spring Airlines has a flight from Sapporo to Shanghai. The lowest price is 299 yuan, which is considered a special ticket. Return air tickets from Shanghai to Sapporo are basically below 1,000 in October.

If you want to go to Japan, you can pay attention to the official website of Spring Airlines.