Bullet train visit to Mt Fuji

We plan to take bullet train Tokyo to Kyoto. Can we get off train for a few hours to visit Mt Fuji for the day before finishing trip later in the day?
Which station is best to get off/on?
Is there left luggage at that station so we can leave our bags?
Will breaking trip like this increase train fare? JR pass not warranted for us!
Thanks
Peter

Qn: Can we get off train for a few hours to visit Mt Fuji for the day before finishing trip later in the day?

Ans: Yes

Qn: Which station is best to get off/on?

Ans: You have to first decide how you want to visit Mount Fuji. Shin-Fuji Station provides access to the Fujinomiya trail
http://www.japan-guide.com/e/e6930.html

Qn:Is there left luggage at that station so we can leave our bags?

Ans: There are lockers that you can use.

Qn:Will breaking trip like this increase train fare? JR pass not warranted for us!

Ans:It will increase the shinkansen limited express fee.

Hi. Thank you kindly for your quick and helpful response. Could you please answer a a few more questions please:
July 11th. Best/cheapest way to get to Hoeizan from Shinkuju Washington?
Best/cheapest way to get from Hoeizan to Bullet train for Kyoto?
Do we need Oxygen for Hoeizan Lower Rim climb?
How long to climb from Hoeizan to Lower Rim?
Best place for safe storage of our bags whilst climbing?
FYI. we do not want to go to top summit and JR pass not viable for us!