Originally Posted by slippahs

As I'm sure you know, with separate tickets, you are on your own in case of a misconnect. If you were booking the same ticket, the MCT for JL international to HA domestic is 2 hours, so use that as a guide. But I personally would build another hour in there with the understanding that if I still missed the connecting flight, the difference in fare for a change in flight will be on me unless I get lucky with a sympathetic agent.