Enhertu approved in Japan as first tumour agnostic HER2 directed medicine for previously treated patients with HER2 positive metastatic solid tumours

Daiichi Sankyo

23 March 2026 - Based on four Phase 2 trials where Enhertu demonstrated clinically meaningful responses across a broad range of tumours.

Enhertu (trastuzumab deruxtecan) has been approved in Japan for the treatment of adult patients with HER2 positive (HER2 [ERBB2] gene amplification or immunohistochemistry 3+) advanced or recurrent solid cancers refractory or intolerant to standard treatments.

Read Daiichi Sankyo press release

Michael Wonder

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Michael Wonder

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Outcome , Medicine , Registration , Japan