This is the size of a RINKO Bag which packed a road bike into that requires removing both the front and rear wheels.
Trains in Japanese city centers get crowded, so traveling with a bike bag(RINKO Bag) can be quite a hassle.
When boarding a train with a RINKO Bag , it is considered good etiquette among Japanese cyclists to ride in the first or last car and secure the bag against the wall.
It is much easier to pack the bike into a box with total dimensions of 200cm or 260 cm or less and have it shipped via courier service from the airport to your hotel.