need help to figure out which passes to get

Hello,
I'm planning to get JR pass, but looks like some of the shorter trips use a Regional pass so not sure which passes to get.
Rough itinerary
7/8/24 arrive Narita airport go to Shinjiku.
7/9 go to Akhihabara day trip then back to Shinjiku.
7/10 go to Kamakura and back to Shinjiku.
7/11 Go to Yokohamai and back to Shinjiku.
7/12 leave Tokyo and take bullet train to Osaka.
7/14 Leave Osaka and take bullet train to Fukuoka.
Will be in Korea for a bit, then back to Japan to Kyoto on 7/22.
7/23 go to Nara and back to Kyoto
7/24 go to Kobe and back to Kyoto
7/25 leave Kyoto and go to Chiba

I was planning to get the 3 week JR pass as it's same price as getting 2 separate 1 week JR passes.
I'm confused which pass to take for the short trips.
Any help is greatly appreciated! Thank you!