The snow remains dry, but the "temperature gradient" shifts. The powder becomes slightly denser—what the Japanese call hanare-yuki (separating snow). It is still excellent, but the float factor diminishes. By late February, you risk the "crust layer" if the sun melts the top few centimeters and the night freezes it again.

However, there is a serpent in this Eden:

By Christmas, the "Siberian Express"—a relentless conveyor belt of cold air sweeping over the Sea of Japan, soaking up moisture and dumping it as snow on the western slopes of Hokkaido and Honshu—is in full roar. This is when Niseko’s infamous "Jacuzzi" bars fill with Australians escaping the summer heat. This is when the JMA (Japan Meteorological Agency) starts issuing avalanche warnings for the famous "Gate" systems. The holy grail is the January thaw , or rather, the lack thereof. From December 27th to February 10th, Hokkaido’s average temperature hovers around -8°C (17°F). This is the Goldilocks zone. Too warm, and it rains. Too cold, and the crystals become sharp, faceted death stars. At -8°C, the snow is champagne.