OSAKA -- They are called "Net uyoku," or Internet rightwingers.

Unlike their more vocal colleagues, who are highly visible in their huge sound trucks, blaring slogans at full volume, Net uyoku are usually anonymous and rely on a computer mouse rather than a megaphone to get their point across.

Since the late 1990s, Net uyoku have flooded electronic bulletin boards with their views on issues such as Prime Minister Junichiro Koizumi's visits to Yasukuni Shrine and Japan's wartime role.