Tomakomai is best known as a major port, with shipping services to points throughout Honshu. There are two separate terminals, both served by local buses from JR Tomakomai station (~20 min to either) and by long-distance buses direct from Sapporo (around 1:30).
Kawasaki Kinkai Kisen (川崎近海汽船) "Silver Ferry" to Hachinohe, 4x/day
Shosen Mitsui Ferry (商船三井フェリー) "Sunflower" to Oarai, 2x/day
Taiheiyo Ferry (太平洋フェリ) to Sendai (daily) and Nagoya (3-4x/week)
Tomakomai-ko East Ferry Terminal (苫小牧東港周文フェリーターミナル). This terminal is home for Shin-Nihonkai Ferry.(42.609801,141.819742)edit
Shin-Nihonkai Ferry Tomakomai Terminal (新日本海フェリー苫小牧東ターミナル), Hamaatsuma 17-6, Atsuma, ☎ +81 0145 28-2800, . This ferry has lines connecting daily to Tsuruga and Akita, and to Niigata 3 times a week.(42.609801,141.819742)edit
Northern Horse Park, (A free shuttle bus service operates out of Shin-Chitose airport every hour.), ☎ +81 (0)144-58-2116, . Northern Horse Park' is 50 hectares of natural parkland where you can enjoy an entire day of horseback riding or cycling.edit