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A Hokkaido Ainu group has filed a lawsuit seeking the return of 279 ancestors' remains held at a state-linked facility, according to Nippon.com and The Japan Times. The case was filed on May 8, 2026, with the Sapporo District Court by descendants from kotan settlements in and around Shinhidaka, Hokkaido.
Key developments
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The plaintiffs are members of the Shibechari Ainu Tribe, an Ainu descendants' group established in 2019. They are asking for the return of 279 ancestral remains currently stored at a memorial facility at the National Ainu Museum and Park, known as Upopoy, in Shiraoi, Hokkaido.
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Nippon.com reported that the remains are held in a facility managed by Japan's land ministry. The plaintiffs say Ainu funeral and burial customs are rooted in kotan communities and that Ainu tradition does not treat human remains as property held by individuals.
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The complaint argues that the right to care for the remains belongs to the descendants and their settlements. The plaintiffs also cite international law in support of the claim that kotan communities should be able to look after ancestral remains connected to them.
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The case places Upopoy's memorial role under legal scrutiny. The facility has been used to store Ainu remains while return arrangements are considered, but the lawsuit challenges who should decide the proper place and method of care.
What to watch
The next major development will be how the government responds in court and whether the Sapporo District Court accepts the plaintiffs' framing of communal descendant rights. The cited reports confirm the filing and the plaintiffs' core claims, but they do not report a hearing date or any court ruling yet.
The case may also affect future return requests involving Ainu remains stored at public facilities. For now, the confirmed issue is narrow but significant: whether this group of descendants can compel the state to return 279 remains from Upopoy to their own community care.
Sources
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