Prosecution, oppositions, expert opinions, and trials for invalidation. Mr. Igarashi is also qualified to represent parties in court in IP litigation. He specializes in organic and polymeric materials. He handles prosecution, expert opinions, and licensing in the field of organic materials, inorganic materials, and metal materials for Japanese and foreign clients. He also has experience in the research and development of amorphous polyesters and cellulose particles for liquid chromatography fillers.