Go here and log in https://www.uniqlo.com/my/store/customer/account/login change your password there if you feel so inclined. No idea whether the data breach you're referring to is real or not. Don't follow any direct links in emails or text messages. Do your own Google searches.
If the breach was real I'm sure their would be a message on their website I would check that out
Thanks! Your answer is awaiting moderation.