Create a square 1:1 composition containing four fictional Japanese-style advertisement images arranged side by side in a clean two-by-two grid. Each ad should represent a different category, such as skincare, travel, food, and a finance or mobile app service. Use trendy professional graphic design, polished Japanese advertising layouts, refined typography, clean product or lifestyle imagery, tasteful color palettes, and clear separation between the four panels. Keep all brands, logos, app names, product labels, discount badges, and campaign text fictional. Make the result look like a curated design portfolio board of modern Japanese ads. Avoid real brand logos, trademarked UI, misleading financial claims, medical or cosmetic guarantees, unreadable critical text, and low-resolution artifacts.