Day trip: itoshima or nagasaki?

Hi all!

I will be staying in fukuoka for 4 days around november/december, and i only have 1 day which i can go for a day trip (already have dazaifu on my list for another day). Would you guys recommend Itoshima or nagasaki? I'm not a huge beach person but is open to going to itoshima anyway if its nice + the foliage. I'm interested in going to nagasaki but am worried it might be too exhausting with the travel time. Another point of consideration is i won't have a car.

Has anyone been to both and have any thoughts? thank you

by grey_opaque12431