Where can I stay in Tokachigawa Onsen where I can enjoy the "Bijin-no-yu (a hot spring of beauty)" 100% natural hot spring?

I would like to enjoy the luxury moor hot springs, known as the "Bijin-no-yu (a hot spring of beauty)" in Tokachigawa Onsen, with the water flowing 100% natural hot spring. Please let me know of any recommended hot spring inns that have moor hot springs 100% natural hot spring.