Originally Posted by
JALPak
Can't comment on NH but I usually just type in jal-wifi.com manually for both domestic and international flights. At least it's the same captive portal URL across the 2 (used to be 3) providers and the URL is printed on the leaflet and is highlighted in red

Yes, I agree that is indeed common to have to key in that URL based on my JAL experiences over the past couple of years, and pre-pandemic too. In my cases, the jal-wifi.com URL was in my devices' browser histories anyway.