Stuttering affects as many as 1 in 100 adults, or 70 million people worldwide. Stuttering is a disorder defined by a broken pattern of speech, either by the repetition of syllables, prolongation of words, or extended pauses. STACHA permits wearers to experience a stuttering-like sensation by sending a faint and thankfully painless, current of electricity through the larynx, which then constricts the muscles in the throat, making it difficult to properly pronounce words. From this experience, general people can get an understanding and empathy for stuttering people.

It's the creation of a team of seven designers and developers. STACHA project has been selected to exhibit the project at SXSW from Todai to Texas. Todai To Texas (TTT) is a program for students and startups from The University of Tokyo (or "Todai" in Japanese). Selected teams get free tickets to SXSW and showcase products in the Trade Show. It is an official program of The University of Tokyo, organized by Division of University Corporate Relations (DUCR). This project has run since 2013 and TTT2019 is the 6th year.