I'm planning a trip to Japan and want to know what lounges I'll have access to in this situation. I won't have OW sapphire till after this trip but will have Priority Pass.
Flying in on International JAL business class, I believe I'll have to exit and won't have lounges on arrival?

I'm planning to have a separate Class J ticket to Nagoya a few days later. As I understand it, domestic "business class" doesn't include domestic sakura lounge access and you need domestic first class for that. Is it possible to go from T1 to T3 airside to use the ANA lounge with PP? Or does Japan allow crossing security multiple times to use lounges like in the US?