There is a developing depression currently approaching Japan from the Southwest which is going to provide some interesting weather over the next few days.
The origin of this system is tropical so the moisture content is high and the precipitation models are showing the heaviest precipitation to approach Nozawa so far this season. The downside to this is that to begin with it will be reasonably warm.
The current prediction has it tracking Northeast along the east coast of Honshu. This will initially push warmer southerly and easterly winds towards Nozawa with accompanying rain. The rain should begin to fall on Friday morning. As the system pushes North the winds will swing to the northerly quarter and the temperatures will drop.
By late friday snow should develop and gradually lower to village level during Saturday. If the Low can slow it progress and stick close to the Honshu coast north of Tokyo this could produce a day of knee deep powder on Sunday.
I’ll be looking for a stick watch report early next week showing the levels well up above 2m again.
Beyond this we can expect a few falls next week and possibly a larger and colder low around the 7th/8th of Feb tracking down from Russia.