So… is there a particular reason for this long transit? JL and NH each has hourly shuttles to ITM, maybe it will be easier to book (rebook) for a shorter transit? The domestic JL Sakura lounge is fine, but definitely not a place you want to spend a long time in..

In you want you can also check with the JAL domestic check-in counter in HND T3 about an earlier flight. Same-day standby (mostly) does not exist for JAL, but for all kinds of reasons (irrops, loading, etc) they might be flexible to move you.