Right on Rte 230, the main road through the valley, with English brochures and maps, an English-speaker, and a small museum with photos of Jōzankei in the booming years of days gone by.
Part of the Noboribetsu Onsen bus terminal, with bus schedules, English maps and a list of hotel baths open to day trippers. Luggage storage ¥500 per day.
Before heading up any trails, check for closures and bear sightings on the map here. Staff are helpful and they also rent out bicycles for ¥500 per day.
Excellent (and free!) information on the local topography as well as indigenous flora and fauna, a short walk west from the Tōya-ko Onsen bus terminal.
English brochures and hiking maps, at the entrance to Jigoku-dani.
Inside the Tōya-ko Onsen bus terminal, with maps, pamphlets and bus schedules in English.