That's pretty ridiculous. Toronto connects to a lake which connects to a river which connects to an ocean, therefore Toronto connects to an ocean? What kind of logic is that? That's like saying that St. Louis is a costal town because it sits on the Mississippi which attaches to the Gulf of Mexico which attaches to the Atlantic.
Surely the point should be whether the city is on a tidal section of the river? If so, it could be said to be coastal, n'est-ce pas? In which case London would be the answer for the UK.
My home town in the UK is a mile or so up from the tidal limits of its river. It's also almost 50 miles from the coast. I wouldn't call that 'coastal' by any means, we're almost as far as you can get from the sea in the whole region
Hamburg is on the River Elbe and not right on the coast, but including the suburbs and considering that it's one of the biggest harbors in Europe, I thought it should be included too.
Second column: starting to get challenging
Third column: yikes!