The World's Most Powerful Diesel Engine
trex279 writes "The Wartsila-Sulzer RTA96-C turbocharged two-stroke diesel engine is the world's most powerful diesel engine built to date. Each cylinder displaces a whopping 111,143 cubic inches (1,820 liters, equivalent to a cube 4 feet on a side) and produces 7,780 horsepower. The engine is about the size of a small building." The engine is intended for use in container ships.
Wärtsilä is a finnish company. But then there are some people who think that Nokia is japanese as well so I guess you're in good company :)
http://en.wikipedia.org/wiki/W%C3%A4rtsil%C3%A4