The Y1 Trail begins at the end of the long mountain road from Anbo. Full details in the guide but it leads to the following wonderful places:
This is the first highlight in the trail and when the forest opens out into space. You should get to see deer roaming around as you walk along the raised boards.
If you are not too exhausted by now, the M1 Trail continues down and then up again (N1 Trail) to the summit of Mt.Nagata. Again there are sweeping views to the West on a clear day.
After Mt.Miyanoura the trail becomes the M1 Trail and it descends towards Shintakatsu Hut and then the O1 Trail to Jomon Sugi.
For more information about the Y1 Trail and Yakushima -
check out the one and only Yakumonkey Guide to Yakushima