Locate and check in to your hotel early as it'll be difficult to locate after dark
See the Hakone Open Air museum
See the shrine
Go to Lakeside, and take a boat ride
Dine near Lakeside, there are plenty of nice restaurants to eat
Go back to Hotel and sleep
Try the Japanese styled breakfast in the hotel.
Take the train and see the mountain views.
See more temples.
Go to see the flowers blossoms.
Take a tour bus ride back to Tokyo.