The rules
Strollers are exempt from the oversized baggage rule, so no special reservation is needed for them.
Fold the stroller on board and keep it out of the aisle.
Family tips
A last row seat gives you space behind the seats for a folded stroller and a suitcase.
Seats near the multipurpose room and accessible toilets are handy for changing and feeding.
With a Japan Rail Pass, seats with an oversized baggage area are included at no extra cost. Book them by scanning the QR code on your pass at a Shinkansen ticket machine or at any staffed JR desk. Get your Japan Rail Pass