MinebeaMitsumi
6479.TMEDIUMPrecision Miniature Bearings & Micro Actuators (Humanoid Critical) · Weight: 4%· Data as of 2026-05-05
Investment Thesis
World #1 miniature & small-diameter ball bearings (< 10mm bore) — a sub-10-supplier global oligopoly for the precision miniature segment critical to humanoid robot joints. Jointly developing a geared micro actuator (W:13mm x H:19.4mm x L:60.4mm, 5kg finger lift) WITH Harmonic Drive Systems for humanoid robot hands — confirmed supply chain partnership. Debuted at CES Jan 2026 specifically targeting humanoid robots. FY2026 guidance: revenue ¥1.55T (+22.8% 9M YoY), OP ¥100B. Forward PE 13.75x on strong growth makes this the cheapest way to play humanoid component demand.
Risk
1) EV/FCF 74.69x = thin free cash flow despite revenue growth — high capex burden for precision manufacturing expansion. 2) Optimus/Figure scaling slower than consensus (reduces near-term bearing order volumes). 3) ROE 9.1% is not exceptional for a moat company — ROIC 4.95% barely covers cost of capital, suggesting leverage is masking the return profile.
Monitoring Trigger
If humanoid robot unit shipments miss 50K in 2026 (from current ~10-20K), TRIM — the demand pull is the entire thesis. If FY2026 OP guidance is raised above ¥120B at May earnings, ADD. Watch Q1 FY2027 (Aug 2026) for humanoid segment revenue disclosure.
Key Dates
Update History
NEW addition. World #1 miniature bearings + Harmonic Drive micro actuator co-dev confirmed at CES 2026. Fills precision bearings gap in robotics supply chain coverage.
Key Metrics
Business Segments
| Segment | Revenue | Share | Description |
|---|---|---|---|
| Precision Technologies | (part of ¥1.55T FY2026) | Largest segment | Ball bearings, rod-end bearings, HDD pivot assemblies. World #1 miniature bearings. |
| Motor Lighting & Sensing | (part of ¥1.55T FY2026) | Second segment | Spindle motors, stepping motors, DC motors, fan motors, automotive motors, sensing devices. |
| Semiconductor & Electronics | (part of ¥1.55T FY2026) | Third segment | Semiconductor devices, optical devices, power components. |
Supply Chain Evidence
| Evidence | Customer | Product | Detail |
|---|---|---|---|
| confirmed | Harmonic Drive Systems (6324.T) | Geared micro actuator for humanoid robot hands (co-development) | Joint development of 13mm x 19.4mm x 60.4mm micro actuator capable of 5kg finger lift, with MinebeaMitsumi strain sensor in fingertip. First public demo at CES Jan 2026.[source](2025-12) |
| probable | Humanoid robot OEMs (Tesla, Figure AI, Agility, etc.) | Miniature ball bearings for joint actuation modules | World #1 in miniature ball bearings (<10mm bore) — required in all precision robot joints. Supply constraint with <10 global suppliers for high-torque precision actuators.[source](2026-01) |
| confirmed | HDD manufacturers (Seagate, Western Digital) | Ball bearings and pivot assemblies for hard disk drive spindles | Core historical business in secular decline — humanoid robotics is the growth replacement thesis for precision miniature bearings demand.[source](2025-05) |
Sources & References
Peer Comparison
| Company | PE | Fwd PE | ROE | Op Margin | FCF |
|---|---|---|---|---|---|
| Fanuc | 45.7 | 38.6 | 9.35% | 21.4% | N/A |
| Yaskawa Electric | 21.38 | 29.16 | 7.84% | 8.7% | +¥11.8B |
| Keyence | 40 | 38 | 12.4% | 51.0% | N/A |
| Kawasaki Heavy Industries | 25.35 | 31.65 | N/A | 5.3% | +¥46.9B |
| Harmonic Drive Systems | 458.8 | 164.1 | 5.9% | 7.9% | N/A |
| Omron | 38 | 22.57 | 2.3% | 6.1% | +¥5.9B |
| Nabtesco | 40.8 | 35.6 | 5.46% | 6.78% | +¥19.6B |
| Nidec Corp | 6.3% | 5.0% | +¥174B | ||
| Daifuku | 38-41x TTM | 27.92 | 18.38% | 15.26% | +¥53.9B |
| Denso | 13.93 | 9.62 | 7.89% | 6.69% | +¥201.2B |
| THK | 58 | 37.4 | 3.22% | 6.75% | +¥23.9B |
| Hamamatsu Photonics | 45.68 | 38.54 | 4.12% | 6.70% | N/A |
| Cyberdyne | N/A | 125.47 | -0.13% | -11.95% | -¥222M |
| MinebeaMitsumi | 18.66 | 13.75 | 9.1% | 6.5% | +¥16B |
| SMC Corporation | 26 | 27.2 | 7.9% | ~20% | +¥99B |
| MISUMI Group | 21.33 | 18.7 | 9.4% | 10.4% | +¥32B |
| NSK Ltd. | 26 | 24.7 | N/A | N/A | N/A |
| SANYO DENKI | 30.7 | 21.9 | N/A | N/A | N/A |
| Mabuchi Motor | 13.6 | 18.3 | N/A | N/A | N/A |
| NTN Corporation | 16.3 | 16.3 | N/A | N/A | N/A |