Shotokan is a style of
karate. It is the style of the man who first brought karate from
Okinawa to
Japan,
Gichin Funakoshi[?].
Shoto was Funakoshis pen name for writing poems, while
Shotokan was the name of the hall where "Shoto" trained his students. He did never try it give the style a name; he always called what he was doing plainly karate.
Shotokan karate is today split up on a few different organisations.