Not quite, Deadborder. Of the three Japanacorps, Renraku is the one that has been quiet for the longest time. Which scares the drek out of some of us, since Renraku being quiet means trouble's coming.
As far as what the three corps do, they're all into a little bit of everything, like all megas, but in their main focus, it ends up being like this.
Renraku - Big in computers, mid range in half a dozen fields, concentrating on making digital infrastructure (i.e. everything that uses the Matrix). Not putting themselves out there (any more) like NeoNET does, but that's why no one's gone crazy on them in the last decade.
Shiawase - Support services. Serious bank to be made in hauling trash, being the fire department, and so on. This is one of the things Shiawase is best known for, especially in North America.
Mitsuhama - Computers, natch. And they aren't shy about doing the research of questionable ethics. Otherwise, they're one of SK's biggest competitors when it comes to heavy industry, and go toe to toe with the big A on the magic front (with less blood magic, though).
