The Yodogawa 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:
HANA-NO-EGO HIGHLAND MARSH
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.
KUROMI DAKE (1831 m)
MIYANOURA DAKE (1935 m)
The trees disappear as the trail continues and the last part of the hike to the top of Mt.Miyanoura is through rocks and short grass. At the summit you can see the whole island from coast to coast on a clear day.
NAGATA DAKE (1886 m)
If you are not too exhausted by now, the trail continues down and then up again 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 Okabu trail and it descends towards Shintakatsu hut and Jomon Sugi.
For more information about the Yodogawa trail and Yakushima - check out the one and only Yakumonkey Guide to Yakushima