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Component maker

Harmonic Drive Systems

The original maker of harmonic (strain wave) reducers. In November 2025 it said humanoid-related orders were about 1.3 billion yen in Q2 and that prototype production orders from US customers were rising; there are reports that it splits supply of Tesla Optimus reducers with China's Green Harmonic.

Latest valuation

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Not disclosed

Disclosed funding

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excluding rumors

Robots

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Registered models

Founded

1970

6324.T

JapanReducer, Actuatorhds.co.jp