Tina
I'll be staying in Tokyo. Is it possible to go to Jigokudani Monkey Park & Mt. Fuji on the same day as 1 day trip?
Akane
As much as I understand your effort to fit in all possible sightseeing spots in a short amount of time, the two are in totally different directions and takes a lot of time to get to, so no it isn't possible to see the monkey park and Mt. Fuji in 1 day.