Here is a list of the ski areas which will be open after 5/7 (Tue) (*The snow amount is as of 5/7. () shows the last operation date). Now, only 3 ski areas are open in Japan.
Gassan ◎590cm (6/9), Kagura △80cm (5/19), Shiga Kogen (*Shibu-toge and Mt. Yokote) △50cm (Mid-May 5/17)
*”◎” … Over 80% area open, “○” … Over 50% area open, “△” … Under 50% area open, “×” … Not open
*The off-piste areas which are out of control but available for skiing are open in Mt. Norikura (Lower August), Senjojiki (Lower May), Tateyama (Lower June) and so on.