Having done both, I'd say door to door total travel time of Tokyo -> Osaka is shorter by train. But I like to get to airports two hours early to deal with secur

Having done both, I'd say door to door total travel time of Tokyo -> Osaka is shorter by train. But I like to get to airports two hours early to deal with security non sense. YMMV. Also, a standard Shinkansen seat is far more spacious and comfortable than any economy plane seat.