Professor Tsujino is a leading cosmetic chemist and Specially Appointed Professor at Kobe University. With over 30 years of experience in both academia and industry, his research focuses on hair science, sustainable cosmetic ingredients, and bioactive compound development. He played a key role in the discovery and scientific validation of Tostea®, the key component in the Re Bonding series.

Yoshinobu Tanaka is a Japanese hair stylist known for his deep expertise in hair science and damage repair. As the founder of his own salon “TACO,” he has worked extensively with clients who suffer from chemically treated or highly damaged hair, gaining recognition for his innovative techniques, especially in bleach-resistant smoothing and long-lasting texture control.

Tanaka played a pivotal role in the development of TOSTEA, a breakthrough hair care ingredient created in collaboration with Professor Tsujino of Kobe University. His insights from real-world salon challenges directly influenced the formulation, focusing on repairing and reinforcing hair structure through advanced amino acid bonding.

With a passion for bridging science and beauty, Tanaka continues to educate both professionals and clients on how chemistry can transform hair health.

Shuji Kida is a veteran hair stylist based in Beverly Hills with over 30 years of professional experience. Renowned for his deep understanding of both Japanese and American beauty trends, he has served a diverse clientele including celebrities and professionals. Beyond his work behind the chair, Shuji has contributed to product development and provides expert consultation on haircare solutions. His work is grounded in scientific hair knowledge, with a focus on damage control and long-lasting beauty.