if you actually factored in the airport costs & time which you haven't it's still better to use the train for a lot of the central cities. the prices are only this competitive now because they were hiked up by about 70% in 2023, so this isn't representative of the actuallly enourmous economic benefits the shinkansen line has had for japan over it's post-war life. if it wasn't as good as air travel they wouldn't be investing iin expanding it with the enourmously expensive new maglev line.
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