Asked JAL customer support. They do not offer at Narita an equivalent service as stand-by in the American sense; Basically you need to already have purchased a ticket to pass the security zone and proceed to gates.
Sometimes I get the same problem where I'm unable to perform this online; what I do - I call directly to the airline (have your PNR/ticket number ready) and ask to have your seat assignment. It will be wise if you know the type of airplane before so you can get visualization about the layout).
Also, when you get your seat assignment over the phone - ask to ...
It's a low-tech solution, but you can download JAL's flight schedules as PDF and eyeball them manually. They're Japanese only, but fairly straightforward: the plane type is listed in the second column, everything not starting with 7xx is a non-Boeing aircraft, and there's a code key on page 9.
Most all airlines operate waitlist systems and allow you to hook into them with awards as well. Here's the basic idea, award or not:
You book a ticket with the airline, selecting a backup flight that has free seats, plus another flight that would be your preferred choice, only it's full. This is the waitlisted flight.
You will likely need to go through ...
We can say for certain you do not qualify for the JAL/Alaska rate on a JAL-operated, AA-marketed flight. As stated on the very page you link (emphasis added),
Flights must fall within the eligible flight number range below, and your flight must be marketed and operated by Japan Airlines.
Eligible flight numbers
To ensure flight ...
You always check in with the operating carrier of the first flight. In your case, that would be British Airways. This is true both for online check-in, as well as at the airport/baggage drop/etc.
What happens after that can vary.
Depending on the carriers involved, their policies, and their computer systems, the first carrier might be able to give you ...
Summary: This is technically possible, but in practice you may struggle to find an agent with the expertise and motivation to help you achieve it. Depending on your exact itinerary, a self-service work-around may be possible. As always with all things involving multiple airline IT systems, your mileage may vary.
First, some background. The details of your ...
Typically, with inbound flights into the US, everyone clears customs at the first port of entry (ie ORD in your case) irrespective if they're transiting domestically or internationally.
Everyone arriving at a port of entry to the U.S. is subject to inspection by Customs and Border Protection officers for compliance with immigration, ...
Always check in with the airline operating the initial flight in your itinerary. In this case, you'll check in with British Airways for your outbound flights, and with JAL for your inbound flights.
Whether you can check in to all flights on the itinerary will depend a little on the arrangements the airlines have with each other, but typically (and in my ...
While I can't find an official source for you, this usually reliable forum has a recent thread about transit from narita to haneda which states the negative:
Or we must organize and pay for our transport and carry our luggage?