Travelling to Japan for the first time for 4ish weeks are any of the transport passes worth it?

I'm going to Japan in May this year for about 3 and a half weeks (doing the first 2 weeks with my sister and the rest solo). I've just booked the flights to arrive and depart from Osaka. My plan so far is the:

kansai region for the first week so (osaka 4 days and kyoto 3 days)

fly down to tokyo area for about a week and a half (including day trips to mt fuji, kamakura, kanazawa and so on)

grab a shinkansen back down to kansai area after my sister heads back home and do day trips to places like hiroshima and down south

I'd be doing quite a bit of travel as in like maybe 5-8 trains per day for the first 2ish weeks and slowing down to like just day trips closer to when I leave. So just wondering if there any travel passes anybody knew which would be worth it or ill be fine just using an ic card. Thanks!