The state Department of Land and Natural Resources is considering how to remove a large metal object that washed ashore on the Big Island's southern coast.
Department spokeswoman Deborah Ward said Monday the yellow object doesn't have any markings that would help identify where it's from. It's not clear whether the debris might be from tsunami that struck the northeastern coast of Japan last year.
The object is 10 to 15 feet tall and about 20 feet in diameter.
It washed up on rocky shoreline in Waikapuna near Naalehu.
Two pieces of confirmed tsunami debris have shown up in Hawaii.
A large blue plastic bin from Fukushima was found in waters off Waimanalo last month.
Last week, fishermen found a skiff from Iwate some 800 miles north of Maui.