On the two experiences that i have brought along my mtb (in a bike box with dimensions of 134x22x74cm) i have had to apologize to reluctant bus driversuch:.
Gifu Bus (gifu to shinjuku). Nippon Chuou (takasaki to nagoya).
Jr Kanto Bus website states that even fold-able bicycles are disallowed with dimension restrictions of 1m for all luggage....
Most probably due to lack of sufficient luggage space in the trunk room and insurance reasons. I was only allowed to bring aboard my bicycle after much apologies. It helped that i traveled during off-season with only a few people.
Cross region koussoko bus luggage holds tend to fill up pretty fast in high season....
Nowadays i just takkyubin it or take the train(great hassle:thumb1......
YCAT to the airport and tghe one that goes from Yokohama to Osaka... not sure of the names but I have a access to a bike hard case that you strip the wheels off, drop the saddle or remove it and twist the bars.... looks basically like a suit case.
Wheels went in to the overhead no problem.
How we fly:
and how NOT to store your bike in the storgae compartment on a coach~
Some rather expensive bikes getting thrown in there.
One art to getting your stuff stowed is act as if nothing is out of place.... walk in give them the baggage walk off, just one sniff of a reason for them to say NO and they will take it!
Actually, I've carried a bike in a box on the limousine bus from Narita. I paid an additonal baggage charge of 1000yen.
Also, I was able to take it on a KiraKira Bus from Tokyo to Shikoku.
I agree with FarEast. If you ask too many questions, the tendency is to say no; I've sometimes turned-up with my bike in bag and just put it into the luggage compartment. I say nothing and neither does the driver
Since im going to do this trip only once with my bike now (returning to europe for this summer) I wasnt planning to buy any harcase, so i went to Y's road and got one of those cardboard boxes where they get their new bikes. My bike will be neatly packed, but still bus companies (Highwaybus.com + JRBus) said NO NO... Should i just count on it that they let me go when i arrive there with my box and being very sorry