Livedoor Co. had increased its stake in Nippon Broadcasting System Inc. to 42.5 percent in terms of voting rights as of last Feb. 23, according to a report submitted by the Internet service provider.

The figure compared with 40.5 percent as of Feb. 21, says the report submitted to the Finance Ministry's Kanto Local Finance Bureau. In terms of outstanding shares, including those without voting rights, Livedoor's stake was 39.56 percent.

Livedoor is involved in a fierce battle with Fuji Television Network Inc. for a controlling stake in NBS, Fuji TV's major shareholder.