Yakuodo Co., Ltd. (Headquarters: Morioka City, Iwate Prefecture / President and CEO: Koichi Saigo / hereinafter referred to as Yakuodo), which operates 466 drugstores in the six prefectures of Tohoku, as well as Tochigi and Ibaraki Prefectures, will implement the fourth major renewal of its "Skin Diagnosis" function, integrated into the official Yakuodo app, starting Wednesday, July 1, 2026. Yakuodo's concept is to replicate the "customer-centric customer service" cultivated over many years in stores within the app, and has been progressively evolving the skin diagnosis function. The first phase implemented an explanation function that learned from the knowledge of 100 staff members. The second phase involved a proprietary multi-recommendation function and a redesign of product categories. The third phase involved a shift to an AI specialized in skin diagnosis, achieving stable explanation quality. - Renewal Highlights 1. New "Skin Consultation LLM" - Towards a place where you can consult about your skin anytime The biggest change this time is the addition of the "Skin Consultation LLM," which allows users to consult about skin concerns anytime. From an icon constantly displayed at the bottom right of the app screen, users can freely ask questions and concerns about their skin condition and skincare. Previous skin diagnoses primarily focused on understanding skin condition based on diagnostic results and checking explanations and recommended products. This renewal adds a new conversational interface to respond to the desire to "ask for more details" or "consult about skin concerns." The Skin Consultation LLM further expands the diagnostic experience provided by the skin diagnosis-specialized AI revamped in the third phase. It evolves into an experience where users can not only receive diagnostic results but also confirm "what kind of care is suitable for my current skin" and "how to understand my skin concerns" through dialogue. 2. Added pre-skin diagnosis counselin