Is NISMO only for Nissan?

NISMO is exclusive to Nissan cars, yes. Nissan's rivals, meanwhile, each have an own performance section. For instance,  

Toyota Racing Development (TRD) is the company's internal performance brand.

The Toyota Sequoia, 4Runner, Tacoma, and Tundra are current TRD models.

Honda Performance Development (HPD) is responsible for comparable tasks.   

The Honda Civic Type R, Honda Ridgeline Sport, Acura TLX, and Acura NSX supercar are some of the division's current HPD products.

Therefore, NISMO goes a step farther with performance compared to most of its rivals, but other manufacturers may employ aftermarket parts and

decals that are readily accessible in the marketplace to construct their "performance edition" automobiles.