u/roguewhispers

We are going in a couple of days. We are 2 people, and we will probably mostly use luggage forwarding. Is there any point in preordering shinkansen tickets? And if so, whats the best way to do so? Seems a lot of people have trouble doing so

Dumb question, i am new to this. I have proton, including protonpass and auth. Currently my phone functions as my passkey with biometrics. I would like yubikey as a backup, like in case my phone is lost/broken/stolen. Would this work, or does that end up as yubikey being the only signin option?