It's really unclear if I can make a connection in NRT or not. Looking for anyone who has recent experience.

My planned flight was on JAL from TPE-NRT-BOS. This was available on JAL's website, but suddenly disappeared 2 days ago. However, JAL's site does have 2 separate flights that work (a China Airlines codeshare + same JL flight to BOS). For some reason you can buy them separately but not as 1 ticket. Note: It is same day arrival/departure.

I called JAL who said the fare was not available and if I planned to buy each segment separately, I should call China Airlines to confirm if they would put my luggage through to BOS, and if I could board in TPE at all. I'll call tomorrow, but my problem is even if they say it's not a problem so long as I show them my JAL segment confirmation, I don't want to show up at the airport and be told the opposite thing.

Anyone face a similar scenario?