I Need some itinerary advice!

Hey everyone I am trying to do another japan trip I have done mostly everything in the main cities but will enjoy to revisit them for some things. After the Hokkaido part of the trip can someone please recommend me something else if there is anything better we are so stuck and we need to get planning AHH Bare in ind I will be flying fromChisote to osaka after the hokkaido portion

Travel Itinerary Summary: Image:

• Dec 7: Perth to Tokyo – Flight from Perth to Tokyo (10 hours).
• Dec 8: Tokyo – Free day to relax, staying at Matt’s place.
• Dec 9: Tokyo to Sapporo – Flight to Chitose Airport, visit Nijo Market, Sapporo Beer Museum, Odori Park, and Mt. Moiwa.
• Dec 10: Otaru & Yoichi – Drive from Sapporo to Otaru, then Yoichi, and back to Otaru. Stay overnight in Otaru.
• Dec 11: Sapporo – Drive to Kokusai Ski Lodge for a day of skiing, then return to Sapporo.
• Dec 12: Sapporo to Asahikawa – Optional day trip to Asahikawa.
• Dec 13: Sapporo to Shiraoi – Visit Upopoy National Ainu Museum and Park.
• Dec 14: Shiraoi to Noboribetsu – Visit Off Road Park, Hell Valley, and a private onsen.
• Dec 15: Noboribetsu – Relax, enjoy food, and onsens (stay at a ryokan).
• Dec 16: Noboribetsu to Hakodate – Visit Mount Hakodate, Onuma Park, Fort Goryokaku, Red Brick Warehouses, and the Morning Market.
• Dec 17: Hakodate to Kyoto – Travel to Kyoto, relax after travel, and enjoy a nice dinner.
• Dec 18: Kyoto – Hozugawa River Boat Ride, Philosopher's Walk, and other activities.
• Dec 19: Kyoto to Kanazawa – Visit Ninjadera, Kenrokuen Garden, Higashi Chaya District.
• Dec 20: Kanazawa – Explore Omicho Market, Seisonkaku Villa, Kanazawa Castle, and possibly Kaga Onsen.
• Dec 21: Kanazawa to Gunma (Kusatsu) – Visit Kusatsu Onsen.
• Dec 22: Gunma – Visit Nioshidashi Volcanic Park, Tanigawadake Ropeway, and Haruna Shrine.
• Dec 23: Gunma to Tokyo – Relax day in Tokyo.
• Dec 24-26: Tokyo – Sightseeing, shopping, Christmas Dinner with brother.
• Dec 27: Tokyo to Atami – Travel to Atami.
• Dec 28: Atami – Onsen day.
• Dec 29: Atami to Tokyo – Return to Tokyo, relax before flight.
• Dec 30: Tokyo to Perth – Travel back to Perth (10 hours).

the main part is yeah how do I make the trip better while making it relaxing but I think I am happy with our Hokkaido Part sorry for the wall of text I have a spreadsheet but cant upload an image