In the whole world Kawaba is the skijo I have spent the most amount of time at.
I keep going back because I like almost everything about it! First, it is very easy to get to from not only my house but is also probably the closest good skijo from Tokyo by car. A shuttle bus also runs from Numata station if you are taking the train. This option will take slightly longer than the Yuzawa resorts but is less expensive.
Second, the snow is really good! Due to its elevation (1870m) and location Kawaba gets consistent dry powder. There are also a good variety of tree runs where fresh lines can be found even late in the day. Do be careful about ducking ropes though, especially if there is a big scary sign. The main creek running beside the number 7 run can have some big holes in it; not a good place to be.
Third, the views are spectacular. On a bluebird day Mt. Fuji, Mt. Asama as well as the north and south alps are all visible. The giant rock face behind the upper quad lift is also pretty impressive. The frozen snow covered trees are also worth seeing.
Forth, for those who like wall riding and park features Kawaba has got you covered. Their actual half-pipe is pretty small but the walls along the bottom of the number 7 run form a natural half-pipe which is perfect for wall riding. They also have a nice park with some small jumps as well as rails and other features for all levels.
Fifth, the free parking garage! Covered free parking is a good thing.
All and all a good off-the-international-radar skijo!
Snow condition on visit:
Though Tenjindaira gets more snow, Kawaba has the driest snow I have experienced in Gunma. Usually a decent amount of it too!
Things I liked:
Good dry powder snow. Easy to get to from Tokyo. Nice shuttle bus service. Free parking garage!
Things I didn't like:
Sometimes a little crowded on weekends.
Authentic Japan experience