Here is a nice Story on S.o.S about the Roland story. it starts in 1930 but in fact Mr. Kakahashi started Roland after the Ace company (drum machines + organs) with the SH Series (yes, I still like it!) SH1000 in 1972..
The History Of Roland
some Roland on my Site..
the SH Series can be found there but also on the old section timeline..
long live the SH!..