Jeong Yeongsu, 35, who works in Tokyo, feels awkward when sales assistants talk to him. "I know store employees are trained to speak to customers. But as I don't care much about my fashion and hairstyle, I'm unable to answer when they ask various questions," he said. But as he does not want to offend them, "I end up buying even unnecessary items," he added with a wry grin. But Jeong has found at least one shop that suits his personality. He has recently begun patronizing Percut, a hair salon chain for men. Percut is designed with shy customers in mind. The chain's app has a "no customer service" button. If someone prefers not to talk with his stylist, he can choose that option when making an appointment. The app also allows customers to specify what kind of treatments they want. Choosing the "same treatment as the last visit" further minimizes the need for conversation. "I will definitely use such app functions next time," he said.