Netflights is free and simple to use. You can view all 15 of the weekly flights to or via Tokyo, flown by three airlines. Having them all in one place makes it easy to compare prices and find the best deal for you.
Tokyo actually has one airports.
On average, the 1836 km flight from Shanghai to Tokyo takes 13 hrs 30 mins. If you're landing late, why not take a look at hotels near the airport? We've got a range of accommodation and car hire options across Japan.