How do you guys write Ayumi's name on your ID3/4 tags?

[JEWELian]

I always tag it in Japanese, yes (I always tag everything in Japanese).

if you're going to tag her in english, tag her as "ayumi hamasaki." (Not "Ayumi Hamasaki" or "AYUMI HAMASAKI.")

She's always spelt her name in lower cases in english (as opposed to artists like Koda Kumi or Ami Suzuki, etc).