Need support with travelling in Japan

Hello, I would be so grateful for any help you can give me with deciding how to get around. We are visiting in October 2026 (I´m planning early:)
This would probably be our itinerary:
Day 1 Travel from Haneda to Osaka,
Day 2-6 Staying in Osaka, day trips to Kyoto, Hiroshima and Miyajama and Nara, as well as getting around Osaka
Day 7 Travel from Osaka to Tokyo
Day 8-14 Staying in Tokyo, getting around the city, day trips to Kamakura and Fujiyoshida
Day 15 Travel to Haneda

I was in Japan a couple of years ago and found the JR Pass along with Suica very convenient. Back then it was considerably cheaper though. I´m thinking it would probably be better to buy a regional pass and paying for individual tickets for Tokyo-Osaka and back.

Thank you so much for your help in advance!!

Best wishes,
Gigi