[runholm]

Not well known in the west, but Mitsubishi has been and is active in an insane number of business sectors:

Shipping, motor vehicles, home electronics, bank and finance (UFJ holdings), nuclear power, cameras and optics (Nikon), industrial chemistry, beer brewing (Kirin) and real estate.

[patrickyan]

That's just the zaibatsu/keiretsu/chaebol system. Samsung also does everything from shopping malls to credit cards to heavy industry.