I have a domestic flight (within Japan) booked with ANA; this is a single flight with no connecting international segment. The aircraft I'm flying on is a 777-200 from Tokyo-Haneda to Sapporo.
I've found, eventually, both "Information Regarding Baggage [International Flights]", which obviously doesn't apply here, and "Information on Domestic Flight-Baggage", though it doesn't answer the below question.
In short, what I want to know is can I take a laptop messenger bag along with a rucksack. Both are small enough to typically fit beneath the seat in front.
The international rules say:
In addition to personal belongings (handbags, laptops, cameras, umbrellas, etc.), passengers are allowed to carry on only 1 pieceof baggage
Whereas the domestic rules say:
[…] other than personal belongings (hand bags, cameras, umbrellas, etc.) […]
Given the "etc." in both of these, it isn't clear to me how big a personal belonging can be! Certainly my laptop bag is smaller than some handbags, but its omission from the latter list (and the fact it's the only one omitted) worries me.