In some interviews, Nakamatsu has described his "creativity process", which includes listening to music and concludes with diving underwater, where he says he comes up with his best ideas.

[1][2] 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.

[3] In June 2014, Nakamatsu, who has contended that it should be possible for people to reach 144 years of age by taking care of their health, revealed that he is suffering from prostate cancer and that his doctors did not expect him to live past the end of 2015.

[30] In September 2015, Nakamatsu appeared at the awards ceremony for the Ig Nobel prizes, where he performed a song about his medical condition.

[36][37] Nakamatsu has appeared on several American TV shows, including Lifestyles of the Rich and Famous, Late Night with David Letterman, CNN's Make, Create, Innovate, and Bizarre Foods with Andrew Zimmern.

In 2009, Danish filmmaker Kaspar Astrup Schröder made a humorous documentary about Nakamatsu titled The Invention of Dr.

The ceremony, held in Cortlandt Alley in New York City, was planned in conjunction with the museum's exhibition of various inventions and personal artifacts of Nakamatsu.