Thanks William for your reply!
The map is helpful and I am able to google the direction based on your information. The hotel provided me the ropeway station Yukon, I could not visualize the location based on their information.
I checked out the Google Streetview of Ubako Station. Once you get off the Ropeway godolas, you go downstairs and there is a corridor- one side linking to the more obvious exit (which will go to the main road and would be a diversion), the another side leading to a barely recognizable small door leading to stairs and onto a secret passageway into the premise of the Hakone Green Plaza Hakone to the hotel lobby in 3 min through a small footpath under the trees (there is a small sign in Japanese and English telling it's the direction to the hotel; you may ring the hotel and the staff will be picking you up if with luggage).Edited: 18 March 2018, 18:00
If you check inside Ubako Station using Google Streetview, the above sign is placed next to the poster of Odakyu Romance Car in the corridor.Edited: 18 March 2018, 18:03
Got it, thank you all, very helpful
Luckily we don't have a lot of luggage, our hotel in Tokyo will store our luggage for us.
Make sure I get this right
From Kyoto to Odaware station with Shinkansen train
Odaware station change to local train to Hakone-Yumoto
Take ropeway to Ubako station and walk to hotel
If ropeway does not run, then we have to take the bus from Hakone-Yumoto station