An interesting weather pattern has developed over the last couple of weeks which has been unusual for Japan at this time of year.
Depression after depression has approached from the southwest of Japan, passed along either the east or west coasts and then disappeared off into the pacific. As these lows approach they bring in warm moist air which usually damages the lower mountain snow pack with wettish snow or rain. As they pass the southerly flow is replaced with a northerly which is always cooler and a reasonable snowfall ensues.
Nozawa is currently being affected by one of these northerlies and heavy snow is expected tonight. The weather will clear late Saturday until another system arrives from the south on Monday. The snow level should rise again from this, rain in the village but snow on Yamabiko. Mid next week a ridge moves in and a period of sunny weather should eventuate.
Longer term there appears to be a continuation of the current pattern. Warmer systems from the southwest. This is certainly turning out to be a frustrating season. Unfortunately it looks like you’ll need to stay up the top of Nozawa to get the best snow!