9 days seem too short for this itin .. i wld consider dropping Asahikawa, Furano n mayb Kushiro
Sounkyo to Abashiri (alternative route)
From Sounkyo, drive towards
Kamikawa-Sounkyo kita IC to enter the
E39 Expressway all the way to exit at
Engaru to go to Abashiri. This stretch is TOLL FREE. Can hit top speed. Very little cars.
If u have time, (instead of taking Route 333 to Abashiri), head towards
Kami Yubetsu MichiNo Eki - the restaurant there serves local
Wagyu steak hotplate and
big fresh scallops. I think Lunch only.
To save on cost, u can order 1 Scallop and then “追加” +1 ... u will be given 2 scallops & just 1 burner to cook.
But If u order 1 scallop for each person, without “追加”, u will be given 1 scallop n 1 burner each, which costs 50% more.
Abashiri
Recommend
Lake Abashiri Tsuruga Resort. Modern, with onsen, big common space, good food. Not cheap.
A traditional onsen resort is the
Abashiri-koso, popular with locals. Their kaiseki meal is grand. Can b pricey. Some rooms in old wing are a bit dated.
More wallet friendly will be
Dormy Inn Abashiri.
Stop by Abashiri Banya - check out the live seafood stall for King Crabs ... friendly staff and prices were very reasonable back in 2018
Cape Notoro for pics
Akan
can try
New Akan Hotel, it has a very large communal outdoor heated pool on its rooftop (have to wear their swim wear) ... quite fun, especially when snowing
it also has segregated onsens inside
The BF n Dinner buffet is very popular, pre-covid, it was a Tour Group favourite n service can be iffy
Lake Kussharo / Lake Mashu / Kawayu Onsen
Search Google Map for "
Kotan onsen" .... try something different

there r a few of these dotted around
Lake Kussharo ... at some the locals really do what the locals do
Lake Mashu - if good weather, this is a must. Go up morning. Observation No3 has free parking but check if shortest road up is open. No1 car park, 10misn drive away, has fees.
Kushiro
- the Fish Market is closed on Sun .. do check opening times
Obihiro
- supposedly have good onsens .. tried Kangetusen, pricey but good service
- the Tokachi Onsen area is rather quiet, without any shops
- subsequently stays at
JR Inn, APA hotels were more convenient, near JR station easy to find food
- must try the famous Buta-don ... I prefer the Tonta outlet, cheaper, more charred, a bit further away
Have you heard of
Lake Shikaribetsu ? A bit of a drive to get to from Obihiro. Need more time.
it's a long drive from Obihiro to Chitose, toll quite high too
Some of the above places are covered in one of my trip reports some years back.