I was mistaken.
If you don't mind the taxi price, you probably won't need to transfer from Nagano.
Private cars and sightseeing buses (some days) need to change at Sawando.
Previously, it was common to take a bus from Matsumoto Station to Shinshimashima Station and from there to Kamikochi.
https://www.alpico.co.jp/traffic/datas/files/2022/08/22/6d6ede13e69f58...However, there are now two buses that go directly to Kamikochi from Matsumoto Station.
https://www.alpico.co.jp/traffic/local/kamikochi/national/It seems that on the way back, you will have to change trains at Shinshimashima Station on this route, so the fastest way to travel would be to take a direct bus (or taxi) from Nagano Station or a fixed-price taxi from Matsumoto Station written by frog1954. .
By the way, about 30 years ago, we tried to head from Matsumoto to Kamikochi the day after heavy rain, but there was a landslide the day before, and the buses were closed, so we took a taxi round trip with my mother to Kamikochi. (via Nomai Pass)
I tried to cancel because the taxi fare was expensive, but since I had booked a hotel, I was hesitant but decided to go.
It was my second visit to Kamikochi, but I was impressed by the scenery. However, I didn't have time to drink coffee at the Gosenjaku Hotel, which is now just a memory.
There are no ATMs in Kamikochi, so if you're taking a taxi from Nagano, it's best to bring plenty of cash. Taxis from Nagano do not have a fixed price.
Now, electronic money such as SUICA and PASMO can be used at Gosenjaku Hotel and Nishiitoya Sanso.
https://www.hokurikushinkansen-navi.jp/pc/news/article.php?id=NEWS0000...