I'm Japanese and now Living in Bandung, Indonesia.
About 90% of the popularity is Muslim here. I believe the Quran doesn't address the issue of nail polish, but I hear a consensus among the mainstream Muslim community is that praying with nail polish is NOT halal because the barrier it creates on nails prevents the pre-prayer ritual of washing from being completed. Is this true?
Anyway, I love nail polish and will enjoy it here as I do in Japan. I'm still a super beginner level, but I think I'm ready to share what I do with you.