Yoshiro Nakamatsu (中松 義郎, Nakamatsu Yoshirō; born June 26, 1928), also known as Dr. NakaMats (ドクター中松, Dokutā Nakamatsu), is a Japanese inventor. He regularly appears on Japanese talk shows demonstrating his inventions. Nakamatsu is known as a perennial candidate in Japanese politics, having contested elections regularly since the early 1990s.
Nakamatsu has described an unconventional creative process, which involves sleeping just four hours from 4 a.m. to 8 a.m., a music listening routine, and eating one meal per day, explaining that "this saves time for more work." He regularly swims laps and dives underwater, where he says he comes up with his best ideas, and records them on a waterproof notepad. Nakamatsu claims to benefit from lack of oxygen to the brain during his dives, making inventions "0.05 seconds before death." He also claims that his "Calm Room," a bathroom constructed without nails and tiled in 24-karat gold, encourages creative thinking by blocking television and radio waves. He also has an elevator in his house that he claims helps him think better, although he strictly denies that it is an elevator and describes it as a "vertical moving room". He predicts that he will live until the age of 144.
Nakamatsu is a prolific inventor, and he even claims to hold the world record for number of more than 3,200 inventions. While his claim to a "world record" has been described as a record for patents by several media articles, several other sources do not list Nakamatsu among the world's most prolific inventors (he has six patent families).
Among Nakamatsu's early inventions is the Shoyu Churu Churu, a siphon pump used in the home to move soy sauce from large containers to smaller vessels for cooking and serving. His patented inventions include:
Juusyoku Record (Japanese: 重色レコード, romanized: Jūshoku rekōdo, lit. 'stacked color record / dual color record') – An optical sound media which uses a printed paper sheet instead of transparent film (1952)
"Magnetic record sheet" - "a method for forming signal record track comprising a number of spiral signal track loops ..." (1964)
"Enerex" - System for generating hydrogen and oxygen
"PyonPyon" - Jumping shoes with leaf springs on their soles
"Cerebrex" armchair, a chair that supposedly improves mental function such as calculation and thinking by cooling the head and heating the feet
A condom with an embedded magnet, supposedly "improving sensitivity" as "electricity is generated in the blood vessels in the female organs by Fleming's left-hand rule"
A protective envelope for floppy disk (1975-1983), and a head-cleaning floppy disk (1981-1988)
A CD for supposedly "enhancing brightness or sexual function"
A cigarette-like device for supposedly "activating the brain"
A pillow preventing falling asleep while driving (an air compressor strapped to the cars headrest, forcibly feeding air to the driver)
A peephole in a sheet of material, described as a "oneway visible shielding object"
Spectacles in the shape of eyes, so that the user appears to wear no spectacles
A "wig for self defense" — a strip and a weight are attached to a wig. The wearer swings the wig to hit an attacker.
Love Jet - A sexual enhancement product which he created out of concern about Japan's declining birthrate. In a 1995 interview, he explained that the purpose of the aphrodisiac was "to save Japan".