Entrance to the walking path to see Yuhodo Bairin (遊歩道梅林). From Takao Station, it's a 15-min. walk to here.
The path goes along the river and you can walk all the way to Kogesawa Bairin on the far end, about 5 km away. It would take about 90 min. one way. Then take the bus back to Takao Station.