TOKYO, Jan 23 (Reuters) - Japanese insurers plan to raise insurance policy costs for ships carrying liquefied natural gas (LNG) in Russian waters by about 80% from Wednesday, the Nikkei business daily reported.

Tokio Marine & Nichido Fire Insurance, Sompo Japan Insurance and Mitsui Sumitomo Insurance Co are likely increase insurance policy costs for damages caused to vessels to more than 20 million yen ($154,356.72) from the current roughly 12 million yen, the report said on Monday. ($1 = 129.5700 yen) (Reporting by Tokyo Newsroom Editing by Chang-Ran Kim)