As the sign says, rock climbing to the right, hiking to the left (yeah, yeah, the pictures are reversed!). Christmas Eve was an outdoorsy day! Chris, SMS and I drove about 2 hours and change to get to Mt. Joyama, a great south-facing rock climbing wall with multi-pitch routes in addition to single pitch. Although we drove, Ohito Station is the closest station with about a 20 minute walk to the trailhead.
Mt. Joyama is part of a chain of several small mountains. The translation is that they are "volcanic neck mountains," created by solidified magma in the central vent of the volcano. The outer layers of the volcano erode away leaving only the solid core as a small mountain. I think a better translation would be a volcanic plug mountain, just like the "Nine Sisters of San Luis Obispo County" that Morro Rock is a part of. The descriptions of how each of the hills/mountains formed is pretty similar. The other two mountains that are part of the hiking trail are Mt. Katsuragiyama and Mt Hottanjoyama. The mountains are outside Izunokuni City.

