Deciding between a private airport transfer vs train in Japan depends on group size, luggage, arrival time, and hotel location. This guide compares costs, convenience, and practical scenarios so you can choose the most efficient arrival option for your trip.Deciding between a private airport transfer vs train in Japan depends on group size, luggage, arrival time, and hotel location. This guide compares costs, convenience, and practical scenarios so you can choose the most efficient arrival option for your trip.