Masanobu Sato did Japan proud at last week's Masturbate-A-Thon, held in San Francisco on Saturday. He whacked away his old record of 9 hours and 33 minutes with a new one, 25 minutes longer. This new time helped him maintain his title as the masturbating world record holder.

So how did Sato (pictured above) hold on for that long? He came armed with masturbating aids from the company he works for. In an interview with SFWeekly, he reveals even more of his secrets:

My abundant imagination was a key to my triumph firstly. Secondly, I trained a lot in Japan from the time I won the 1st prize last year. I swam twice a week, and gained about 5 kgs in muscle.That helped me a lot, too in terms of stamina. Thirdly, the variety of sensations each TENGA gave me was ideal for long masturbation. Without those variety sensations, my dick would feel the same sensation for a long time, which would paralyze my dick in the end. I use as many as 10 different TENGAs so that my dick avoids being paralyzed."

Dick paralysis? Yikes. 

He says that he also took advantage of Japanese pornos, and imagined his girlfriend, family and other co-workers during his almost 10-hour whack-a-thon. I hope that by "imagined" that he didn't mean imagined, because the "family" part would be really wrong.

Sato says that he hopes to break the record of 10 hours next time. When asked if he would attend the world championships in Copenhagen, he said that he's "not sure about it as it's a bit too much to do marathon twice a month."