Is it possible to go for disabled during the foliage season?
May use electric scooter.
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You could send an inquiry to the official web site - https://www.alpen-route.com/en/ at firstname.lastname@example.org but it seems that it would be difficult if you cannot walk short distances or climb stairs - see the pictures of the cable car stations here: https://www.japan-guide.com/e/e7550.html. I don't know if it is even possible to take the scooter, however wheelchairs are available at each station (see "Health" here: https:/…rules.html )
But elsewhere in Japan you will find things easier. Most stations in Tokyo have elevators or some other accommodation. Typically staff will escort you to the train and radio to your destination station so you will be met there. Here is a useful site: japan-accessible.com/transport/…tokyo.htm and check out these videos: https://www.youtube.com/user/kurumaisuwalker
See her video about visiting Takaosan, a popular (and crowded) leave viewing area an hour from Tokyo: https://youtu.be/wvPFdmFSJUQEdited: 25 April 2018, 22:59