TOKYO (REUTER) - Local authorities battling Japan`s worst-ever oil spill disaster got help from an unexpected quarter - a donation of high technology oil cleanup equipment from U.S. cinema superstar Kevin Costner. Costner, the star of "Waterworld", donated a machine that separates oil from water to Ishikawa prefecture, one of the Sea of Japan coastal areas hardest hit by oil spilled by a sunken Russian tanker. The machinery was made by Costner`s firm, Costner Industries Nevada Corporation (CINC), which contacted local authorities after learning of the oil spill damage on Ishikawa`s home page on the Internet, an official said. The equipment, worth an estimated 80 million yen ($700,000), was flown to Japan free of charge by All Nippon Airways and was expected to arrive in Ishikawa on Wednesday. An Ishikawa official said the equipment would likely be used to clean up the harbour at Kanazawa, a scenic regional capital, which has sustained damage from oil slicks. The 13,157-tonne Nakhodka, carrying 19,000-tonnes (133,000-barrels) of heavy oil, broke in two in stormy seas in the Sea of Japan on January 2 some 130 km (80 miles) off the coast.