JR Advice

Hi there,

I'm headed away to Japan for almost 3 weeks and would love your advice on which JR Area passes or tourist passes I should get (if any?). I'm quite overwhelmed by all the calculations so any help would be so greatly appreciated. My itinerary is below, all feedback is welcome!

Day 1. Australia to Osaka
Day 2. Osaka to Tokyo - Shinjuku and Shimokitazawa
Day 3. Tokyo - Shibuya / Harajuku / Akihabara
Day 4: Tokyo - Kappabashi street, Nakamise-dori and Sumo Tournament
Day 5: Tokyo - Day trip to Kamakura
Day 6: Tokyo - Day Trip to Tokyo DisneySea
Day 7: Tokyo - Day Trip to Lake Kawaguchi
Day 8: Tokyo - Day trip to Nikko
Day 9: Tokyo to Nagoya - Pokemon Cake, TeamLab Borderless, Train from Tokyo to Nagoya
Day 10: Nagoya - Day trip to Tsumago to walk Nakasendo Trail to Magome, return to Nagoya and train to Kyoto
Day 11: Kyoto - Temples
Day 12: Kyoto - Day trip to Arashiyama
Day 13: Kyoto to Ine and Amanohashidate (staying in Amanohashidate)
Day 14: Amonhashidate to Kinosaki Onsen (staying in Kinosaki)
Day 15: Kinosaki to Kyoto - Gion and fushimi inari
Day 16: Kyoto - Day trip to Kibune and Kitano Tenmangu Shrine market
Day 17: Kyoto to Himeji and Hiroshima (staying in Itsukushima, Miyajima Island)
Day 18: Miyajima Island to Osaka
Day 19: Osaka - Universal Studios
Day 20: Osaka - return to Australia

I recommend you to consider Kansai Hiroshima Area pass

https://www.westjr.co.jp/global/en/ticket/pass/kansai_hiroshima/

which covers your Amanohashidate, Kinosaki, Himeji and Hiroshima trip. The validity period is 5 days so you need to re-arrange your itinerary.

The Kansai-Hiroshima Pass, as mentioned, would be a good choice if you rearrange things.
You could also consider getting the Nikko Pass.
https://www.japan-guide.com/e/e2358_002.html