Skincare Experts - Japanese Beauty vs Korean & French Products

Looking for skincare/beauty experts who are familiar with Japanese beauty products. I'm looking for an explanation of what makes Japanese beauty products different from Korean beauty products or French beauty products and some lines/products that are worth trying (or worth passing by.) I'd love to talk to dermatologists and estheticians, but can also speak to beauty bloggers or content creators who have an estblished skincare niche and familiarity with this topic. #journorequest