Built in 1983, by Marco Shipbuilding Incorporated of Seattle, Washington (hull #457) as the Naupaka for the Mid-Pacific Towing Company of Honolulu, Hawaii.
In 1998, the tug was acquired by the Smith Maritime Company Honolulu, Hawaii. Which was a part of the Hawaiian Interisland Towing Company of Honolulu, Hawaii. Where she retained her name.
In 2007, the Smith Maritime Company was acquired by the K-Sea Transportation Partnership of East Brunswick, New Jersey. Where the tug retained her name.
In 2011, the K-Sea Transportation Partnership was acquired by the Kirby Corporation of Channelview, Texas. Where the tug retained her name.
In 2016, she was acquired by the P and R Water Taxi Company of Honolulu, Hawaii. Where the tug was renamed as the Kaku.
She is a twin screw tug, rated at 800 horsepower.