Kenshiro

Specs, price & availability ยท verified Oct 2026

Kenshiro is a 158 cm, 50 kg biped from University of Tokyo (Japan), discontinued with no published price.

Price
Not disclosed
Height
158 cm
Weight
50 kg
Total DoF
64

Last verified Oct 10, 2026

Price & availability

University of Tokyo has not published a price

Discontinued

Current dataset status: Discontinued.

Product overview

About Kenshiro

Kenshiro is a tendon-driven humanoid from the University of Tokyo, presented in December 2012. Its 158 cm, 50 kg body is modelled on an average 12-year-old Japanese boy. It uses about 160 cord-and-pulley muscle units, 50 in the legs, 76 in the trunk, 12 in the shoulders and 22 in the neck. Brushless DC motors from maxon drive them, and maxon's application story gives 93 motors in total for the 160 units.

New Atlas and IEEE Spectrum report 64 degrees of freedom, excluding hands. IEEE Spectrum describes the robot as shown at the Humanoids conference in December 2012; the year is inferred from its article date. New Atlas reports that the team wants to learn how muscle groups move with the skeleton and to 'push the limits of musculoskeletal robots further'.

Kenshiro followed Kojiro in the university's line of musculoskeletal robots. According to GIGAZINE, it gives about five times the power output of its predecessor. The university's exhibit page describes Kenshiro and Kengoro as successors that evolved Kojiro's design. Kenshiro has no price, sales channel or public release, and no source reviewed shows it in active development, so it is classed as discontinued.

Capabilities

Key features

160 tendon-driven muscle units

Cord-and-pulley muscle units: 50 in the legs, 76 in the trunk, 12 in the shoulders and 22 in the neck, according to New Atlas and GIGAZINE. [2][3]

Brushless motor drive

Brushless DC motors from maxon drive the muscle units. The supplier's application story gives 93 motors in total for the 160 units. [4]

Human-scale proportions

Built to match an average 12-year-old Japanese boy: 158 cm and 50 kg, with 64 degrees of freedom excluding hands. [1]

Successor to Kojiro

GIGAZINE reports about five times the power output of Kojiro, its predecessor. The university page describes Kenshiro as evolved from Kojiro's design. [3][5]

Hardware profile

Specifications

Official โ€” stated by the manufacturer or organizerReported โ€” stated by a credible third partyEstimated โ€” derived or approximate

Body

Height
158 cmReported โ€” stated by a credible third party[1][2][3][4]Modelled on an average 12-year-old Japanese boy
Weight
50 kgReported โ€” stated by a credible third party[1][2][3][4]
Total DoF
64Reported โ€” stated by a credible third party[1][2]Excludes hands (IEEE Spectrum): 13 neck, 13 per arm, 7 per leg, 11 spine

Mobility

Actuation
ElectricReported โ€” stated by a credible third party[4]Brushless DC motors from maxon (93 per maxon's story); cords run over pulleys
Show unknown fields (12)

Mobility

Maximum speed
Not published
Peak joint torque
Not published

Power

Battery
Not published
Runtime
Not published
Charge time
Not published
Swappable battery
Not published

Hands & Manipulation

DoF per hand
Not published
Payload
Not published
Hand / end effector
Not published

Compute & Sensing

Onboard compute
Not published
Sensors
Not published
AI stack
Not published

Quick answers

Kenshiro FAQ

Can you buy Kenshiro?

No general order page is verified. Kenshiro is currently classified as discontinued. [5]

How tall is Kenshiro and how much does it weigh?

Kenshiro is 158 cm tall and weighs 50 kg. [1][2][3][4]

How many degrees of freedom does Kenshiro have?

Kenshiro has 64 listed degrees of freedom; Excludes hands (IEEE Spectrum): 13 neck, 13 per arm, 7 per leg, 11 spine. [1][2]

Who makes Kenshiro?

Kenshiro is made by University of Tokyo, based in Japan. [5]

What is the predecessor or successor of Kenshiro?

Kojiro is its predecessor. [5]

Side by side

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Lineage

Model family

Evaluation footprint

Benchmarks & competitions

No benchmark embodiments or results reference this robot yet.

Related

Similar robots

Evidence

Sources

  1. [1]Kenshiro Robot Gets New Muscles and Bones (IEEE Spectrum) โ†—IEEE Spectrum ยท press ยท accessed Oct 10, 2026
  2. [2]Kenshiro musculoskeletal robot (New Atlas) โ†—New Atlas ยท press ยท accessed Oct 8, 2026
  3. [3]Kenshiro 'Tendon Shiro' humanoid (GIGAZINE) โ†—GIGAZINE ยท press ยท accessed Oct 8, 2026
  4. [4]Kenshiro robot application story (maxon) โ†—maxon motor ยท other ยท accessed Oct 10, 2026
  5. [5]Musculoskeletal Humanoid 'Kojiro' (HASEKO-KUMA Hall exhibit page) โ†—The University of Tokyo, Faculty of Engineering ยท official ยท accessed Oct 8, 2026