Mount Takao is supposed to be beautiful at this time of year, as the leaves change colour. I suggest meeting at Takao station and get the bus together. We could get the cable car and then have a gentle walk and enjoy the scenery. Fingers crossed we might get to see Mt Fuji from the summit!
MEET AT Takaosanguchi station at 10:45, to take the cable car up. If you want to get the ticket ahead of time, please do. :)