Aizome (Naturally dyed Indigo) Products – Tokyo, Kyoto or Osaka

Hi all.

Bit of an odd one but I'd love to have recommendations on any shops that specialise in clothing or souvenirs in naturally dyed indigo (Aizome) in Tokyo, Kyoto or Osaka. I saw that some stores walk you through the dying process and you can dye something for yourself as souvenir but this doesn't interest me that much unless there's one someone was wowed by. Thank you in advance for any recommendations!

https://www.japan.travel/en/japan-magazine/exploring-the-origins-of-aizome-traditional-indigo-dyeing/