The Jōmon period lasted longer than stated here. According to Wikipedia, it lasted from 14000 BCE (so 16000 years ago) to around 300 BCE (i.e. ~2300 years ago).
TIL about Sebastian Münster's 1540 map of the Americas, the first one to show that North and South America were connected by an isthmus and the first to call it 'The New World.'
Imagine the following:
You actually can stop the time by snapping you fingers, but it stops time for the entire universe, including yourself, with the exception of one single observer on some unimportant planet in the Andromeda galaxy. After 100 years from the POV of that observer, time resumes again.
Would you even be able to tell?
Buddhism is also much younger than 8500 years, and its arrival in Japan much more recent again.