A great ride for this time of year, starting at the Spaceship at 7am on Saturday and ending at Ogawamachi station (though it's possible to end at Seibuchichibu station if you want to cut it short).
It will be nippy in those high mountains, especially when descending, so arm warmers or a long-sleeved jersey and a wind jacket are highly recommended.
A decent front light is a must, as it will most likely be dark by the time we get to Ogawamachi.
Pace will be the usual Saturday speed with climbs WATT, within reason. Lunch will probably be at a 7/11 somewhere to save time.