Japan MHLW Approves Novo Nordisk Wegovy for MASH (June 19, 2026) — First Approved MASH Treatment in Japan, Co-Promoted With Sumitomo Pharma, Based on ESSENCE Phase 3 Part 1 Data
Japan's Ministry of Health, Labour and Welfare granted Novo Nordisk a partial change approval of the manufacturing and marketing authorization for Wegovy (semaglutide) subcutaneous injection on June 19, 2026, adding an indication for metabolic dysfunction-associated steatohepatitis (MASH) without cirrhosis in patients with moderate to advanced fibrosis (stage F2 or F3). Wegovy is now the first approved MASH treatment in Japan. The approval is based on Part 1 of the global Phase 3 ESSENCE study where semaglutide 2.4 mg demonstrated statistically significant superiority to placebo on the co-primary endpoints of liver fibrosis improvement without worsening of MASH, and MASH resolution without worsening of fibrosis. Wegovy is co-promoted in Japan by Novo Nordisk Pharma and Sumitomo Pharma under the October 2025 co-promotion agreement. This is the second major MASH regulatory milestone for semaglutide after the FDA's August 2025 approval.