Study urges Japan-specific rules for human fetal tissue research
Kyoto University says international consent standards leave gaps in Japan’s laws, partner consent rules and local tissue-handling practices.
By Priya Raghavan · Science Reporter
3 min read
A new study says Japan needs clearer governance for research using human fetal tissue, a field tied to developmental biology, congenital disease studies, regenerative medicine and vaccine development. Kyoto University said the work points to gaps that international consent standards alone cannot settle under Japan’s legal and social conditions.
The study, by Misao Fujita and colleagues, was published in Regenerative Medicine. According to Kyoto University, the authors reviewed laws, regulations and guidance from Japan, Europe and North America, and examined Japanese legal materials, administrative documents, statements from academic societies and historical background.
Human fetal tissue research uses tissue obtained after induced abortion. Kyoto University said that makes consent, donor information and transparency central to ethical research practice.
The International Society for Stem Cell Research issued standards in 2022 for informed consent in fetal tissue donation, including what information should be given to potential donors. The study authors said those standards can guide Japanese researchers, but they do not establish Japan’s legal duties or settle questions created by domestic practice.
Three areas of concern
The authors identified three challenges for Japan that they said are not fully addressed by the ISSCR standards. The first involves the position of women undergoing induced abortion who may be asked to donate tissue.
Kyoto University said abortion costs in Japan are generally paid by the individual, and abortion care is often provided in medical institutions that also offer maternity and fertility services. The study authors said researchers and clinicians need to guard against adding pressure or burden when asking about donation.
The second issue concerns male partners. Kyoto University said the ISSCR standards focus mainly on decision-making by the woman, while Japan’s Maternal Health Act requires consent from a spouse or comparable partner in certain circumstances.
According to the study authors, that creates unresolved questions about whether and how male partners should be involved in fetal tissue donation decisions. They also said research involving fetal genetic information raises privacy considerations for the male biological parent.
The third issue involves how fetal tissue is stored, used and disposed of after research. Kyoto University said Japanese law does not clearly define the status of fetuses before 12 weeks of gestation, and local rules on fetuses, placentas and related materials vary by jurisdiction.
The authors said research teams should check applicable local regulations before conducting studies and before deciding how tissue should be handled once the research ends.
Gradual governance proposed
Kyoto University said Japan currently has no dedicated framework that clearly governs fetal tissue research. The study authors said existing laws and guidelines also do not clearly prohibit or permit such studies.
Given that uncertainty, the authors suggested that Japan could build research systems and ethical governance gradually, starting with small-scale basic research. They said the aim should be a sustainable and trusted foundation that combines internationally shared standards with Japan’s legal system and social context.
The authors also said some issues raised by the Japanese case may apply elsewhere as countries create or revise rules for fetal tissue research. Kyoto University said longstanding cultural practices and regional regulations in Japan have shaped how human biological materials such as placentas and umbilical cords are handled.
The study frames responsible fetal tissue research as a way to support ethically sound basic science and future work in regenerative medicine and cell therapy. The authors said governance should be discussed with attention to the people who choose to donate and to the conditions under which such research is allowed to proceed.
This story draws on original reporting from Medical Xpress.