Hi there,
There are round trip bus between Kawaguchiko and Highland Resort Hotel (Fujiyama Onsen).
Please take a Retro bus (Red Line) from Kawaguchiko Stattion.
Here is a timetable for the bus.
http://bus-en.fujikyu.co.jp/heritage-tour/detail/id/1/
Leave Fujiyama Onsen at 10:35, 11:35, 13:35, 14:35, 15:35, 16:35
By the way, if you are going from Shinjuku, there is a special packaged deal we would recommend.
It is called 'Fujiyama Onsen Hotto Onsen Package'.
To purchase this ticket, please make a reservation from Shinjuku to Fujikyu Highland online. Then, when you purchase your ticket at the ticket counter on the departure date, please tell the staff that you want a 'Fujiyama Onsen Hotto Onsen Package'. You can get a very good discount this way.
You can reserve your bus ticket from here.
http://highway-buses.jp/
Well, I hope you have a nice trip in Japan.
Japan Trip Search