Only Yu Hot Springs in Minamiashigarashi, Kanagawa is one of the best Hot Springs near Hakone. We rank it at #5 on our list.
I have surveyed many guests and they overwhelmingly love Only Yu. Only Yu is the only hot spring in Minamiashigarashi and it is nestled in a very romantic wooded setting. It is deep in the forest surrounded by nature, yet it is only a 5 minute taxi, bus or Only Yu courtesy van ride from Daiyuzan station in Minamiashigarashi’s Sekimoto area. 

Only Yu Hot Spring
Only Yu offers: a restaurant, a cafe, a beauty salon, art displays and more. There is also good hiking in the forest around the hot spring.
Directions

You can hike up to Only Yu from Kevin’s Guest House. Just go up the hill towards Doryosan Temple but follow the Daiyuzan Trail to Only Yu Hot Springs.

By public transportation:

Odawara -> 21 minutes by Daiyuzan Line -> Daiyuzan -> 8 minutes by bus* -> Only-you

*Izuhakone Bus / 3 services per day, complimentary shuttles are also available

Shinjuku -> 72 minutes by Odakyu Line -> Shin-matsuda -> Kaisei -> 25 minutes by bus* -> Only-you

*Complimentary shuttle is available.

By Car:

Approximately 60 minutes from downtown Tokyo

Oi-matsuda IC (Tomei Highway) -> 20 minutes west -> Only-you

You can also take part in:

Zanmai Koza – Relaxation Classes

We’ve prepared a variety of complimentary activities such as “Zazen” meditation, Japanese calligraphy and relaxation and stretching classes to help your mind and body relax. Each class is 45 minutes. Spend the day and try out as many as you like.

– from the Only Yu Hot Spring Homepage