COMMENTARY

G1 Rule to Hit Originator Biologics for First Time, Impact Seen for Up to 13 Brands

By Shinya Sato February 25, 2026
Japan’s FY2026 drug pricing reform will, for the first time, apply the “G1” price cut rule for long-listed original biologics facing biosimilar competition — a move that could affect up to 13 ingredients and significantly accelerate price erosions for major…

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