By plane
Haneda Airport Tokyo to Kushiro Airport is a 90 minute plane ride. Rental cars are available across the street from the airport. If traveling without a local contact, a rental car is strongly recommended because public transportation within the city and greater Kushiro area is few and far between. Akan Bus also operates airport shuttles Japanese-only that correspond with every inbound and outbound flight between the airport and Kushiro Station. One-way adult ticket costs 910 yen.
By train
Sapporo Station to Kushiro Station is a 4 hour train ride. It is the last stop on the Super Oozora Limited Express train. There are 6 trains daily from Sapporo detailed schedule one JR Hokkaido's website.
By bus
Kushiro Bus operates daily buses one midday bus and one overnight bus to and from Sapporo schedule and pricing on their Japanese-only website.