Curious Robotics Inc.
Chiba-based maker of CR Hand, a 326 g human-sized 3D-printed five-finger robot hand with 13 joints and 6 motors sold for research and education.
Curious Robotics Inc. (Curious Robotics Kabushiki Kaisha) is a small Japanese robot hardware company located at 1-2 Minamiyama, Shiroi City, Chiba Prefecture, led by CEO Hiroshi Yamaura. A 2025 press release described the company as focused on accessibility and human-robot interaction. Its product is the CR Hand, which was first released in Japan in December 2024 and opened to international buyers in September 2025. The company sells directly: quotations and orders are handled by email, payment is by bank transfer, and hands ship within two to four weeks of an order. The Japanese price is JPY 198,000 before tax (JPY 217,800 including tax) with free domestic shipping, and the English page lists USD 1,500 with free international shipping, down from the USD 2,000 quoted at the international launch. A listing also appears on the Tindie hardware marketplace.
The CR Hand is a five-finger dexterous hand that the company describes as truly human-sized: the distance from the wrist mounting face to the fingertips is 172 mm. It has 13 joints driven by six motors, giving six degrees of freedom, and supports both precise pinching and power grasps. The fingers include spring-loaded joints so that the hand can comply during interaction and avoid damage in collisions, and each fingertip is attached with M2 screws so users can fit their own sensors or contact materials. The body is produced on high-precision FDM 3D printers in PETG, which the company says keeps the price low compared with other robot hands. The hand weighs 326 g, runs on 6 V, and each finger delivers up to 18 N of actuator pulling force. All motors and the control electronics are built into the hand, so it works once a USB cable and power supply are connected; a left-hand version can now be specified at order time alongside the right hand.
Control is handled by an embedded Pololu Micro Maestro six-channel USB servo controller. Users can drive each motor with sliders, write and run scripts, and record and replay motion sequences in Pololu's Maestro Control Center on Windows or Linux, or send serial commands from their own programs. Curious Robotics publishes Python sample code, including a button-panel controller with preset open, pinch, grasp and key-pinch poses, and a beta ROS 2 package with a URDF model through its GitHub account, CuriousRoboticsJP. The package includes a 6 V power adapter, a USB 2.0 mini-B cable, screws, and a mounting flange to ISO 9409-1-50-4-M6 for collaborative robot arms from Universal Robots, Techman and similar makers, and 3D data for the hand and its mounting interfaces is available for download. The company positions the CR Hand mainly for education and research and development, including use as an end effector on cobots, and it is listed among dexterous hand makers in humanoid.guide's manufacturer database.
Primary type & automation activities this supplier delivers:
CR Hand
Human-sized 5-finger, 6-DoF robot hand (13 joints, 6 motors) with built-in USB servo controller, spring joints, swappable fingertips, Python samples and ROS 2/URDF beta.
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Contact Curious Robotics Inc.
WEBSITE
https://www.curious-robotics.comPHONE
+81 90-7802-1245HEADQUARTERS
Japan
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Asia-Pacific
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