The Hakuba Iwatake Snow Field live camera (Nagano) is published on the resort's official site. Open it from here, and check current snow depth, the 7-day snowfall forecast and nearby resort cams.
Cameras: Hakuba Iwatake Live Camera (official site).
Snow depth and the 7-day snowfall forecast are weather-model values for the resort's location.
Live cameras at nearby resorts: