The Port of Tomakomai plays a major role as Hokkaido's gateway to the sea, handling about 50% of all cargo passing through ports in the prefecture. The Port of Tomakomai is divided into the West Port Zone and East Port Zone. The Tomatoh Area includes the East Port Zone. The International Container Terminal was transferred from the West Port Zone to the East Port Zone in August 2008, and international container ship service to North America, Southeast Asia, Korea, China and other counties has been established there.

[Overseas routes]

Route	Ports of call	Departure frequency	Shipping company
North America	Vancouver−Seattle−Tomakomai−Hachinohe −Hakata−Pusan−Osaka, Nagoya−Shimizu−Tokyo−Vancouver−Seattle	1/two weeks	Narasaki Stax Co., Ltd. (Westwood Shipping Lines)
Korea	Pusan−Toyama Shinko−Niigata−Tomakomai−Pusan	1/week	Yusen Kairiku Co., Ltd. (TSK Line)
	Pusan−Tomakomai−Ishikari−Pusan	1/week	Narasaki Stax Co., Ltd. (KMTC)
	Pusan−Tomakomai−Muroran−Pusan(stops at Muroran every other week)	1/week	Narasaki Stax Co., Ltd. (KMTC)
	Pusan−Tomakomai−Akita−Niigata−Pusan	1/week	Nippon Express (Heung-A Shipping)
China, Korea	Pusan−Niigata−Tomakomai−Hachinohe−Hakodate −Toyama Shinko−Pusan−Gwangyang−Dalian−Qingdao−Pusan	1/week	Kurabayashi & Co., Ltd. (Namsung Shipping)
	Pusan−Niigata−Tomakomai−Hachinohe−Sendai −Pusan−Gwangyang−Ningbo−Shanghai−Pusan	1/week	Kurabayashi & Co., Ltd .(Namsung Shipping)
Taiwan	Gaosyong−Niigata−Tomakomai−Hachinohe−Sendai −Keelung−Taijhong−Gaosyong	1/week	Kurabayashi & Co., Ltd. (Pacific International Lines)

(June 2009) 　For details, ask each shipping company.

[Domestic routes]

Area served	Ports of Call	Departure frequency	Shipping Company
Hitachinaka	Tomakomai −Hitachinaka	3/week	Hokkai Transportation
		3/week	Yusen Kairiku Co., Ltd.
Tokyo	Tomakomai −Kushiro−Tokyo	6/week	Nippon Express
	Tomakomai −Keihin	1/week	Narasaki Stax Co., Ltd.
	Tomakomai −Tokyo	4/week	Hokkai Transportation
	Tomakomai −Tokyo	2/week	Yusen Kairiku Co., Ltd.
	Tomakomai −Tokyo	6/week	Tomakomai Kuribayashi Unyu
Kawasaki	Tomakomai −Hachinohe−Kawasaki	2/week	Nippon Express
Yokohama	Tomakomai −Muroran−Sendai−Yokohama	1/week	Tomakomai Futo Co., Ltd.
	Tomakomai −Yokohama−Sendai	1/week
Nagoya	Tomakomai −Sendai−Nagoya−Sendai	3/four days	Fujitrans Corp.
	Tomakomai −Kushiro−Sendai−Tokyo−Nagoya−Tokyo−Sendai	1/week	Hokkai Transportation
Tsuruga	Tomakomai −Tsuruga	6/week	Narasaki Stax Co., Ltd.
Osaka	Tomakomai −Kushiro−Sendai−Tokyo−Osaka−Tokyo−Sendai	2/week	Kurabayashi & Co., Ltd.
	Tomakomai −Kushiro−Sendai−Tokyo−Osaka−Nagoya−Sendai	1/week
	Tomakomai −Kushiro−Tomakomai−Osaka−Tamashima−Takamatsu	2/week	Nippon Express
Hiroshima	Tomakomai −Hachinohe−Hiroshima	1/week	Tomakomai Futo Co., Ltd.

(June 2009) 　For details, ask each shipping company.

[Regular ferry services]

Destination	Travel time	Departure frequency	Transport Company
Hachinohe	about 8 hours	4/day	Kawasaki Kinkai Kisen
Sendai	15 hours	1/two days	Taiheiyo Ferry
Oarai	about 19 hours	12/week (except Sun.)	MOL Ferry Co., Ltd.
Sendai/Nagoya	15 hours (Sendai) 39 hours 30 minutes (Nagoya)	1/two days	Taiheiyo Ferry
Akita, Niigata, Tsuruga	12 hours (Akita) 19 hours 30 minutes (Niigata) 32 hours 30 minutes (Tsuruga)	2/week	Shin Nihonkai Ferry
Akita, Niigata	12 hours (Akita) 19 hours 30 minutes (Niigata)	3/week
Tsuruga	20 hours, 30 minutes	1/day

(June 2009) 　For details, ask each shipping company.