Planning out 48 hours on Yakushima

Hello, all.

I have decided to head out to Yakushima this weekend even if I am only going to be able to stay there for two nights, as it looks amazing and the weather even seems it should be fine. I will mainly focus on hiking.

However, I am very unsure how best to arrange my time, and how ambitious I can be with regards to hiking time. I am hoping those with experience of the trails could chime in.

These are my alternatives:

1. My preferred – but perhaps not feasible – alternative: The ferry to Miyanoura arrives at 12.30 pm. I should be able to get to the Yodogawa trail start with the bus right after that. Then hike up to Yodogawa hut and sleep there. Day 2 get up early and do some hardcore hiking up Mt. Miyanoura, and then down onto the trail on the other side all the way to Arakawa trailhead (i.e. without spending another night in a hut), and down to a nice accommodation in Anbo. Spend day 3 (before the ferry at 13.30 exploring the coast or perhaps Shiratani gorge

2. The same as in 1., except stay in one of the huts close to Jomon Sugi on day two, get down to Anbo day three instead, before the ferry instead.

3. Day 1 go up Shiratani instead, sleep at Shiratani hut (smelly as it may be). Day 2 join the Jomon Sugi trail and go down to Arakawa trailhead before accommodation in Anbo. This misses Mt. Miyanoura completely.

4. Same start as in 1., but return same way back from mt Miyanoura down to Yodogawa trailhead and to Anbo from there.

Any thoughts on what would be most enjoyable for me? I prefer eerie forest landscapes over mountains, but would preferably like both. I also would really like to avoid going back the way I came from. I believe I am a quick hiker, and am finding the estimates time estimates to be surprisingly high given the amount of km and metres of ascent.

A side question here: How cold should I expect it to be in the hut areas?

Thanks a lot anyways!