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The potent effects of Japan’s stem-cell policies

Illustration by Fabio Buonocore

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Nature 573, 482-485 (2019)


Additional reporting by Brendan Maher.

Updates & Corrections

  • Correction 10 October 2019: An earlier version of this feature stated that an anonymous patient received a treatment called HeartSheet, developed by Yoshiki Sawa. The patient was told he was receiving a sheet of muscle cells from his thigh, which matches the description of HeartSheet, and was under the impression that Sawa was administering HeartSheet. Terumo, the company that produces HeartSheet, says that the patient did not receive HeartSheet but instead received an experimental treatment. Sawa has not returned Nature’s numerous requests for information or comment.


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