Donut Robotics Secures ¥300 Million Charm Care Alliance for Eldercare Humanoids

Tokyo-based Donut Robotics is pairing a ¥300 million investment from nursing-home operator Charm Care with an experimental deployment of its cinnamon humanoid, aiming to develop robots that can assist eldercare staff.

Key Takeaways

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• Charm Care will subscribe to ¥300 million in Donut Robotics shares under a capital and business alliance.
• A cinnamon humanoid has been trialed at one care facility since July 2026; the initial focus was conversation with residents.
• Nurse-call support remains a development goal, rather than an established capability of the trial.

The partnership was first announced in Japan on August 31, before an English-language release was distributed on October 5. Charm Care operates more than 100 private nursing homes, giving the startup a partner with experience of care workflows as well as potential settings for future testing.

That network should not be read as a deployment commitment across all of those homes. The release describes an experimental introduction at one facility.

From conversation to nurse-call support

The original Japanese announcement says cinnamon initially served primarily as a way to converse and communicate with residents. Donut says patrol functionality has been developed, with further improvements planned.

The next proposed step is responding to nurse calls: a resident would press a call button, and the robot would approach and help address the request. The October release presents this as work to be developed, alongside a gradual expansion into other support tasks.

Neither announcement provides a measured reduction in staff workload or a breakdown of autonomous versus remotely operated activity. Those details will matter when judging whether the trial translates into useful day-to-day assistance.

A growing cinnamon lineup

Donut’s lineup includes the roughly 170 cm cinnamon 1 and the smaller cinnamon mini, listed at around 130 cm and 35 kg. A next-generation cinnamon 2 is scheduled for an official announcement this fall, following an advance demonstration at AI Expo Summer 2026.

The company also describes a transition toward Japanese production using overseas hardware as a starting point, with chip modifications and assembly in Japan.

The story adds a care-sector example to Japan’s recent humanoid activity, alongside Panasonic’s production ambitions and Kawasaki’s staged autonomy plans for Kaleido. Here, the next test is whether a robot already being tried around residents can take on practical work that helps the people caring for them.