Hideaki Kobayashi is called the "Sailor Suit Old Man" for a good reason. Whenever you see him on the weekend, he is dressed as a Japanese schoolgirl.

Japanese sites and Twitter users in Tokyo have spotted an old man dressed in a sailor style school uniform, a truly unusual sight to behold.

Japanese site IT Media met Kobayashi and asked him the question on everyone's mind: Why do you dress like a Japanese schoolgirl?

"That's a difficult question," answered Kobayashi who tweets from the account @GrowHair. "It's not really something I've thought too deeply about. Hrm. I guess it's because sailor suits look good on me?"

A few years back, however, Kobayashi started wearing schoolgirl outfits at a well-known art and design event. That eventually turned into Kobayashi wearing the threads out in public. And that turned him into an internet sensation.

Click on thumbnail to view (Photos: Internet, Hideaki Kobayashi's Twitter)