Im planning to visit tokyo➡️Hakone➡️Kyoto➡️Osaka
Do i buy the JREastpass or...?
Assuming you’re not returning to Tokyo, no pass is needed.
I suggest buying the JR pass it's good value for money.
It's much cheaper to buy single tickets for one-way travel by Shinkansen reaching Kyoto. A 7-day JR pass would almost cost double.
Between Kyoto and Osaka, just ride on various commuter trains which would be most cost-effective.
use hyperdia.com to check train fares.