Effort to organize the SP/SR Owners' Club was initiated by a one-line advertisement in the February 1974 issue of "Car Graphic" magazine, saying "For Sale - Canvas for a soft top". The person who placed this ad was Chairman Takahashi of the present SROC and several Datsun roadster owners who responded to the ad were caught(?) to start the club.

Then, they made planning and preparation to organize the club. In April, 1975 the first meeting of SROC was festively held.

The club is for the SP/SR Roadsters only. The SROC started as a "One Make Owners' Club" that was rare in Japan then.