Stirling natural landscape, beautiful forests, streams and superb thermal activity. Visited on a long weekend, so was a reasonable number of people on the mountain.
Along with others, found the flatness of the groomed runs a bit frustrating but plenty of fun in the trees, chutes and bowls nearby. Snow depth was quite variable being crusty and windblown up high, was only time I had trouble with rocks and partially covered shrubs while in Hokkaido.
Definitely a mountain with plenty of terrain to explore for the prepared. Huge area for extended winter trips as well with a majestic alpine landscape stretching off to the southeast.
Stayed at the youth hostel (great views from viewing tower and nice outdoor onsen) and the Grand Hotel (cliched name but great value for money with spacious rooms and furnace like onsens complete with indoor waterfall.)
Would consider Ashidake not a mountain for getting heaps of riding in a day, but more of a complete alpine/ easy backcountry experience.
From February, 2008
Snow condition on visit:
Icy and windblown up high, 5-15cm of fresh powder in trees, glorious sunny winters day.
Things I liked:
Superb natural landscape, riding a steaming volcano, backcountry access.
Things I didn't like:
Relatively exy lift pass for Japan, flat areas on groomed runs, ropeway times