I guess the main alternative to the bus would be Narita Express to Shinagawa and the Keikyu line from Shinagawa to Haneda. If you buy it as a through ticket, you can get get a decently easy transfer. You'd need to take one elevator up from the N'EX, but then step free access through the direct transfer gates to Keikyu. If you don't buy it as a through ticket you need the an elevator down (one small and overcrowded) and one up again. The alternative to the actual through ticket is getting a SUICA on your phone and tap your way through and only buy the limited express surcharge at ty counter in Narita.

But I would probably gamble on the bus.....

Yes, I'd much rather the bus. However, I did check the baggage rules and they make it clear you can't have over the allowance even if you pay for another ticket. But I don't have anything to lose by asking when I get there so I will try this first. If that doesn't work out then I will opt for the train. Thank you for the tips.

In order to get the (almost) step free connection and Shinagawa, you need the south connector, which will be towards the front of the N'EX. The north connector requires you to exit from the ticket area to get from JR to Keikyu. And then you need to go down and up again. (forgot to mention this)

Let them know your carry on has fragile items, so can't be left in the baggage area? They do allow decent sized carry ons in the cabin if the bus is not full.....

I appreciate your helpful tips, many thanks. That's a great idea - my carry on case will actually contain very fragile items, all the finest bone china Royal Doulton chinaware. It weighs around 10kg.

I will update here after I travel at the end of this month.

I too am flying JL with a domestic-to-international connection at HND. MYJ-HND-CDG. Single ticket, business class. I'm trying to understand whether the "Through Check-in Service" is only available at certain airports? (If so, why?) Also potentially relevant: my layover is approximately 12 hours, and it's overnight. (The earliest flight from MYJ does not arrive in time, so this was the shortest connection sold.) I prefer to through check if possible.

That is not a problem, your luggage will be checked through to your final destination from Matsuyama. I can't remember if there is a specific counter for it, but they can handle it.

Most domestic airports JAL serves have agents trained in international check-in. I am not sure if an airport like RIS (Rigiri Island, Hokkaido) or MMD (Minami-Daito Island, Okinawa) has agents trained in international check-in, but most domestic airports do. One of many such routes I have flown is AXT-(JL)-HND-(JL)-SIN-(MH)-KUL, where domestic and international were separate.

There will be at least one agent trained in international check-in on duty. When you walk up to the check-in counter, an agent may need to get another agent because of that. Also, not all computer terminals for check-in agents are international capable. You may be asked to move to a different counter where the computer terminal is an international reservation capable. Yes, agents at such airports do not do international check-ins every day, and the check-in may take a little longer. I was always asked to wait at the chair till the agent finished the check-in, but in most cases it was done in less than 5 min. Once the agent had a problem getting a boarding pass printed for one of the international segments, a OneWorld carrier. The agent had no problem printing the baggage tag. The agent phoned Tokyo central office to figure out what could have been going on.

Bottom line, you will through check-in to the international flight at MYJ. It may take a little longer to check in; it should be no more than 5 min., in the worst case, no more than 10 min. So just do not show up 5 min. before the check-in cut-off time at MYJ.

I will arrive at KIX on QR802, which arrives at T1 at 4:25pm.
Will I be able to make a connection on Peach, MM159 KIX-FUK, which is scheduled to depart from T2 at 6:35pm?
Considering Peach's strict policies, I will have to check a bag.
It seems like QR802 is usually on time.
I have been to Japan a couple times before, in case that matters (quicker immigration process or anything).

Be aware the train companies also have a 2 pieces per passenger rule. You are supposed to pay extra at the gate if you bring more. This is not consistently enforced, but you will definitely get evil eyes from locals if you try to take three wheeled suitcases onto a commuter train (such as the Keikyu train from Shinagawa to HND, or one of the direct trains from NRT to HND), and as a practical matter I would never want to be wrestling with this much stuff inside a crowded Tokyo train station. If you can't check it all on the bus, the best alternative may be to bite the bullet and pay for a taxi (probably 20,000-30,000 yen).

Or rent a car and drive yourself...
For that you will need an IDP.

If I were doing this, I would probably take the direct train from NRT to HND. Rucksack and rollaboard on the overhead rack. It's slow and boring but since you can get a seat (at the end of a row) at the start of the journey. you don't need to get through crowded cars when boarding and exiting. You should not attract too many hard stares. I wasn't aware that you could pay to take additional luggage on the train - If it makes you feel good, you could do that.

Cutoff to check in luggage is 30min for domestic flights. Allow 20min for the shuttle bus. That gives you 1h20min to deplane, clear immigration and customs, and walk to the bus stop. You can try but you should have a good backup plan.

Thank you!

One ticket with two airline
 

Hi
We booked one ticket with two airline
SFO to NRT with JL arrive at 4 pm
Connection from NRT to KUL with Malaysian airline at 9:50 pm
Do I need to fill up a Japan immigrant form when we arrive at NRT?
TIA

Airside connection. You will not enter Japan.

Thank you