I have asked around my friend circle and it doesn't appear anyone I know has done this just yet. We're planning to go in 2 weeks to the Alpine Route.
Sources I have read so far, but not limited to:
https://iamaileen.com/tateyama-kurobe-alpine-route-snow-wall…
https://www.japan-guide.com/e/e7551.html?aFROM=2155_7550&fbc…
https://www.japan-guide.com/e/e7550.html
Handful of things I need to clarity.
There's a foreigner ticket we can buy in advance - 'Tateyama Kurobe Option Ticket' is a discount ticket available for 9800 yen we plan on purchasing a day in advance which apparently covers the entire trip one way.
There's a reservation service for the Cablecar and electric bus which are part of the route: https://tateyama-kurobe.alpen-route.com/ticket/en/
- I don't understand how this works because it's asking me to pay when I'm trying to select a time slot, even though the Option Ticket covers my entire route? I want to avoid getting there, and being stuck at one section because we haven't booked in advance. Can anyone clarify what I should do?
Adding more:
We recently got back from this route. I think if you purchase the 9800YEN ticket, you won't be able to make reservations online. I don't remember there being a line specifically for reserved bookings. It was more the case of lining up and just waiting for the next available time for each transport leg. Though we may have missed things since we dont speak Japanese.
It does get pretty crowded and busy with the tour groups, and it seems like tour groups have their own line, which had priority sometimes.
It was managed quite well considering the massive crowd, but the busiest part was where people are waiting to get on Tateyama Highland bus. I think we waited about an hour to get on a bus.
I don't think you'll be stranded but just be mindful of the last bus that will arrive. They provide signs telling you at each stop, the last available time to get to your next destination. There's also a timetable online.
Have a look at this guide too:
=https://nerdnomads.com/alpine-route-japan
They're quite detailed with their journey. They went in spring though - when we went it was filled with snow outside at Murodo, so if you're planning on doing some sightseeing to the viewing platform or climb the mountain, make sure you bring proper hiking gear!
Hope that helps and happy to answer anything else specific if I can!