BLUE SINCERE is based on the concept of "walking together through sunny days and rainy days, no matter the circumstances," valuing customer feedback and proposing stylish, high-function leather items that are suitable even in advanced countries. Even when leather is treated with care, it can accidentally get scratched, get wet from rain, or develop stains from sun exposure during various scenes in the process of continued use. The expression of leather can change significantly depending on usage and environment, with variations in color, luster, wrinkles, and texture, leading to different growth for each user. We want customers to enjoy the beautiful texture and richness of leather with affection. We hope that they will walk through life and create memories with their cherished leather items. BLUE SINCERE was born from this sentiment.