Is it customary to tip a stylist after a free consultation on japanese hair straightening?
If you’re doing this in Japan, no, there is no tipping in Japan ever for anything. If you are in a country that tips, it’s up to you. If you tip at other free consultations, then do so but personally I would not. I tip when service has been done or someone has gone out of their way or have been overly helpful, not free consultations. Free consultations are for you to decide if you would like to use the business. If you like the consultation, schedule an appointment with that same stylist so you can tip them when they do the job.