Piggy-backing onto this thread

My reservation has me flying into HND from Sydney at 5.30pm on Xmas day and flying out at 4.25pm on Boxing Day.
Not sure about entry being allowed into Japan so the back-up plan is the airside transit hotel which is accepting online reservations so I assume will be functioning.
A few JAL related questions - will JAL check my luggage through from SYD to LAX with a 23hr transit in TYO?
- if overnighting airside at the transit hotel will I be able to wander in and out of the JAL lounge at HND during the hours that it is open? (Flying Business Class and AA EXP)?

Thanks