How to pick among three subway lines
Odori, Nakajima, station: Namboku. Nishi 11, Bus Center-Mae, Factory: Tozai. Dome / Fukuzumi: Toho from Odori. Streetcar is Susukino–west short hops — not long haul Lock the axis before you add another district.
JR and bus day trips
Otaru: JR rapid ~1h. New Chitose: ~40 min. Jozankei, Shikotsu, Moerenuma: bus — check last returns. Asahikawa limited express ~1.5h then zoo bus. Subway day passes do not cover these JR rides Lock the axis before you add another district.