I recently visited Bangkok after almost 20 years!
When I was there I visited both the Take5 shop in Siam Square, and the Pronto shop in CentralWorld (there are others). Both are worth visiting if you are in the Thailand. Take5 have a much larger range of the Japanese brands.
Here’s a funny video by the Pronto guys on how to fade denim. It’s like a Thai version of Jackass.
Check their YouTube channel for more videos in the series. Some include subtitles in English that you can toggle on with the youtube toolbar.