
Mount Takao is the easiest mountain day from Tokyo — under an hour from Shinjuku, with a cable car to skip the steep part and a paved main trail anyone can manage. It's hugely popular (it claims to be the world's most-climbed mountain), so the trick is timing: go on a weekday, or start early on weekends.
Most people take the cable car up and walk Trail 1 to the top — easy and scenic. If you want quiet, take a different trail down (Trail 6 follows a stream and is lovely). Clear winter mornings give the best Fuji view from the summit.
Ride the cable car, visit Yakuo-in temple with its tengu statues, walk the paved trail to the 599m summit for Fuji views, eat tororo soba, and see the monkey park — all under an hour from Tokyo.
Yes — a cable car skips the steep start and the main Trail 1 is paved and gentle. It suits casual walkers and families, though it gets very busy on weekends.