I arrive at Chitose airport on the 5th of September (12pm in the afternoon). So considering 1 hour to clear immigration.
What's the best way to get to Wakkanai via train or bus?
I would like to make it to Cape Soya by 7 pm(sunset).
I think it is not realistic to arrive Cape Soya by 7pm if you are arriving to Shin-Chitose Airport at 12pm.
The bus leaves from Sapporo and it takes about 5 hours to reach to Wakkanai. There are only 6 trains per day and from Shin-Chitose Airport to Sapporo takes about 40 minutes by train.
The most sure way and also the fastest way is to take a domestic airline from Sapporo to Wakkanai.
Find more about how to reach Wakkanai from Wakkanai Sightseeing Association's website: