I have very mixed feelings about Mt. Takao Base Camp. On the one hand the location is ideal; right near the station and the foot of the mountain, the staff are very friendly and can make a great cup of coffee downstairs.
On the other hand, myself and my partner's experience was less than ideal.
Be advised there are NO TOWELS to use in the the shower. Just small onsen ones to buy for ¥200.
Firstly the bed mattress was barely more than one-inch thick and was onto of a wooden bed frame and left the sides of my hips bruised from how uncomfortable it was. The pillow was also just a small one filled with buckwheat that just didn't provide enough support.
The worst part however was the noise. Right outside the rooms is a communal living space. The sign says 'Lights out by 11:00pm' but people were still talking and laughing loudly into the night until at least 1:30am. This made getting to sleep almost impossible.
We ended up checking-out a day early and staying elsewhere.