80% of Skin Aging Caused by 'Photoaging': La Roche-Posay Teams Up with Researcher YouTuber Sumisho for April 30th 'No Spot Day' to Explain UV Truths!

LA ROCHE-POSAY, a leading dermo-cosmetic brand from L'Oréal Group's Japanese subsidiary, Nihon L'Oréal K.K. (Shinjuku-ku, Tokyo), has designated April 30th as 'No Spot (4.30) Day.'

In conjunction with this, the official online shop is hosting a limited-time 'Shimi Zero WEEK' campaign. This year, the brand welcomes Sumisho, a cosmetics researcher and YouTuber widely trusted for his expert analysis, to present special content on a dedicated page titled 'The Truth of UV Rays' and 'How to Choose Sunscreens that Shape Your Future Skin.'

Background of 'No Spot Day' (April 30) La Roche-Posay established this day (certified by the Japan Anniversary Association) to inform the public about the importance of daily UV protection and skincare for healthy, spot-free skin.

Through over 88 years of UV research by L'Oréal, it has been revealed that approximately 80% of skin aging is caused by 'photoaging' from sunlight. La Roche-Posay aims to spread knowledge beyond just preventing temporary sunburns, focusing on protecting long-term skin health from future spots and freckles.

Official Online Shop Exclusive: 'Shimi Zero WEEK' Campaign To celebrate the anniversary, a special campaign for the Tone-up UV series and other eligible products will be held. Period: April 24 (Fri) 10:00 to May 1 (Fri) 09:59, 2026 Campaign Details: 1. Annual 5% OFF on all items! 2. Step-up rewards based on purchase amount: Up to 7 luxury gifts. 3. Exclusive coupons for current subscription customers. Details: https://www.laroche-posay.jp/campaign-shimizero.html

Thorough Analysis by Cosmetics Researcher YouTuber Sumisho 'Future Skin Depends on Selection! How to Choose Sunscreen: The Threat of Photoaging and the Truth of UV Rays' Sumisho provides a researcher's perspective on three main topics: 1. Causes of Skin Aging: Photoaging simulations based on L'Oréal's long-term research data. 2. Truly Scary UV Rays: Detailed risks of 'Long UVA,' which accounts for 75% of UV rays reaching the earth and penetrates deep into the skin. 3. Expert Sunscreen Selection: Advice on choosing products based on lifestyle and skin type, beyond just SPF/PA values. Details: https://www.laroche-posay.jp/photoaging-report-2026.html

Brand Overview La Roche-Posay was born in France in 1975 as a skincare brand for sensitive skin. Collaborating with dermatologists, the brand continues cutting-edge research while maintaining a human-centric approach. Its mission is to support skin health for all people, from infants to seniors, as a leading dermo-cosmetic brand.