Matson Navigation Co. has announced an average 5.6 percent increase in shipping costs, effective Jan. 1.

Rates for its Hawaii service will increase by $175 per westbound container and $85 per eastbound container.

The company also will raise its terminal handling charge by $50 per westbound container and $25 per eastbound container, for an average 5.6 percent increase in shipping costs.

The company announced the same average increase Jan. 1 of this year.

“This rate increase will help offset rises in operating costs and support ongoing investments in our Hawaii service,” said Dave Hoppes, senior vice president, ocean services. “This rate adjustment is consistent with our longstanding philosophy of implementing modest, incremental increases as necessary to maintain the highest levels of service.”

In the past decade, Matson has spent nearly $1 billion on four new container ships, fleet enhancements, new container equipment, information technology and terminal facility upgrades, the company said, in its announcement.