Hey everyone, I changed my flights to spend some time in Japan before heading to Honolulu. My original booking is now from LHR to HND in first class, then HND-CTS in business (also on JL). Now that I have an onward, domestic ticket on JL, I should be able to access the first class lounge on arrival according to One World lounge policies.

I land at T3 (where the lounge is), but HND-CTS departs T1. Is my assumption correct that I land, follow the signs for sterile international transit, then grab dinner at the lounge? Afterwards I will need to go through immigration and transfer to T1. Just want to clarify what access on arrival looks like, I don't want to have to double back from T3 to T1 and back to T3 for the lounge and back to T1.