Japan's 'barely useful inventions' mastermind has designed the 'T-shirt Pata Pata,' a hip-level thrusting device that helps you air your top on a hot day

• Kazuya Shibata, Japan's "barely useful" device inventor, has designed a new T-shirt flapper.
• It's strapped to the waist or hip, and automatically thrusts to keep one cool on a hot day.

A Japanese inventor specializing in "barely useful" devices has just served up his latest contraption — a shirt-flapping thrusting machine to be worn on the waist.

Kazuya Shibata unveiled his new device, meant to help users keep cool on a hot day, on Saturday. It's the latest creation in his gadget arsenal, which spans more than a dozen ingenious tools for solving oddly specific problems.

"I have a new invention," Kazuya tweeted, with a video of his new machine's inner workings.

After the initial showcase, he strapped the device to his waist and declared that the device was working "different from what I thought."

"Well, air-conditioned clothes are better," Kazuya wrote.

He's dubbed it the "T-shirt Pata Pata," naming it after the onomatopoeia of fluttering fabric.

The comedy inventor proudly displayed the device's outdoor capabilities in a video posted on Monday evening, in which he affixed the hem of his shirt to the machine using a magnet.

Kazuya, who portrays himself as some sort of cheerful, mad genius, regularly debuts accessories like a fully automatic tissue retriever (for when your hands are wet), a potato chip lifter (so you don't have to squeeze your fingers into the tube,) and a book that blasts your face with light when opened (for that magical Hollywood moment).

He advertises his designs through over-the-top infomercials, like one for his timer-based snack tin, which blocks users from eating when the container decides they've had enough.

Meanwhile, Kazuya encourages his followers to suggest little problems in life he should fix via a message form on his website.

Kazuya did not immediately respond to a request for comment.