Originally Posted by
abmj-jr
I looped the whole island, mostly by JR train, in under 10 days. That included Hakodate, Sapporo, Asahikawa and the national park region above near Asahidake, Abashiri, the Shiretoko Peninsula, the national park/lakes area above Obihiro, Kushiro and a lot of beautiful scenery between those points. To make it even more of a rail trek, I started and ended at NRT, not CTS, stopping in Sendai on the way north and Morioka on the way back south.
You sure packed a lot into <10days!
I'm trying to imagine what I would do in a week if I relied on train (no car). With only a week, I would personally just focus on Hakodate-Noboribetsu-Sapporo-Otaru corridor, as suggested by AlwaysAisle.
Hakodate/Onuma: 2 nights
Noboribetsu: 1 night
Otaru/Sapporo: 3 nights
That's already 6 nights right there.