Originally Posted by
SK AAR
The problem is that most likely you will not be allowed to board the first flight because the first carrier will view your final destination as the country (in your exampleJapan) where you don't fulfill entry requirements and the carrier is not allowed to let you board. To the first carrier your onward ticket with another carrier is immaterial. Traveling on separate tickets is currently not advisable
Right, so that's exactly why I was wondering if this would work.
I did hear of people travel via Doha on that basis (when entering Qatar was forbidden), however, I think both of their flights were with QR so even though on separate tickets they were able to sort it out, stay at the transit hotel on the airside etc. etc..