Aneros is a line of patented male sex toys anatomically designed to massage and stimulate the prostate for sexual pleasure. The Aneros was originally developed by HIH, LLC in 1996 as a device for prostate massage, intended as an alternative means to treat a variety of prostate problems like prostatitis and BPH. Users of the device for health reasons noticed palpable sexual benefits as well. The Aneros is known as the Enemagra in Japan.