Also known as: Japan's Ministry of Health, Labour and Welfare, MHLW
Quoin Pharmaceuticals has secured Orphan Drug Designations for QRX003 in the U.S. and Europe for Netherton Syndrome, while advancing regulatory pathways in Japan and Saudi Arabia. The company reported clinical progress including expansion of pediatric studies and potential for a Priority Review Voucher worth up to $200 million.
Egetis Therapeutics completed its rolling New Drug Application for Emcitate® (tiratricol) for MCT8 deficiency in the USA on January 29, 2026. The drug received European Commission approval in February 2025 and launched in Germany in May 2025. The company also provided updates on Japanese regulatory progress and the status of its Aladote® candidate for paracetamol overdose.
GSK's antibody-drug conjugate risvutatug rezetecan has received Orphan Drug Designation in Japan for small-cell lung cancer, marking its sixth global regulatory designation. The decision was based on phase I trial data showing durable responses in extensive-stage SCLC patients. The drug is currently in phase III development for relapsed ES-SCLC.
Regulatory incentives for rare disease treatments, including market exclusivity and development subsidies, are spurring pharmaceutical innovation across the US, Europe, Japan, and Australia, with multiple companies advancing therapies for conditions affecting limited patient populations.
GSK agreed to license linerixibat to Alfasigma in a deal worth up to $690 million, while Eisai received orphan drug designation in Japan for E2086, a novel selective orexin 2 receptor agonist for narcolepsy.
Dyne Therapeutics is preparing a U.S. Accelerated Approval submission for z-rostudirsen in Duchenne muscular dystrophy and gearing up for a Phase 3 trial of z-basivarsen in myotonic dystrophy, while scaling operations to support potential commercialization.
Sanofi's oral BTK inhibitor rilzabrutinib received orphan drug designation in Japan for IgG4-related disease and warm autoimmune hemolytic anemia, while also securing U.S. FDA breakthrough therapy designation for the rare anemia indication.
Japan's Ministry of Health, Labour and Welfare has granted orphan drug designation to Sanofi's rilzabrutinib for IgG4-related disease, marking the third global orphan designation for this indication based on positive phase 2 study data.
Zenyaku Kogyo obtained Japanese regulatory approval for Rituxan (rituximab) as a treatment for autoimmune hemolytic anemia, a government-designated intractable disease. The approval follows a public knowledge-based application submitted in August 2025.
Japan's Ministry of Health, Labour and Welfare granted Orphan Drug designation to Dyne Therapeutics' investigational treatment zeleciment-basivarsen for myotonic muscular dystrophy type 1, adding to existing designations in the U.S. and Europe.
