Okuma Builds Its Own Brain

TYO:6103

Most machine tool makers buy the brain of their machines — the CNC control — from Fanuc, Siemens, or Mitsubishi Electric. Okuma builds its own. The Aichi-based company has designed and manufactured its OSP control in-house since 1963, making it one of the only major machine tool builders in the world that ships both the machine and the intelligence that runs it. That unusual choice, made six decades ago, has become Okuma’s defining advantage in the age of smart factories.

From Noodle Machines to Machine Tools

Okuma’s history starts in 1898, when founder Eiichi Okuma made machines for producing noodles. The company shifted to machine tools in the early 1900s and never looked back. Headquartered in Ōguchi, Aichi Prefecture — the manufacturing heartland near Nagoya that also hosts Toyota’s supplier network — Okuma today generates annual revenue of roughly ¥250 billion (about $1.7 billion), with the majority coming from outside Japan across the Americas, Europe, and Asia.

Its product line spans CNC lathes, machining centers, multitasking machines that combine turning and milling in one setup, grinders, and large double-column machines for aerospace and energy parts. Customers range from automotive and aerospace suppliers to medical device makers and job shops.

Why Building Your Own Control Matters

A machine tool is only as good as the control that commands it. By designing the OSP control, the servo systems, and the mechanical structure together, Okuma can do things that are difficult when the brain comes from a third party:

• Thermo-Friendly Concept — instead of fighting the thermal expansion that warps every machine as it heats up, Okuma designs machines to deform predictably and lets the control compensate in real time, holding accuracy through the day without warm-up runs.
• Collision Avoidance System — the control runs a real-time simulation of the machine and stops motion before an operator error crashes a spindle, one of the most expensive mistakes in any workshop.
• Machining Navi — the control listens for chatter vibration and suggests or sets the spindle speed that eliminates it, a task that normally depends on a veteran machinist’s ear.

Because control and machine come from one company, these functions ship as integrated features rather than add-on engineering projects. And when something goes wrong, there is no finger-pointing between the machine builder and the control vendor — a practical point that resonates with factory managers everywhere.

Dream Site: Selling What It Practices

Okuma also runs some of Japan’s most advanced machine tool factories itself. Its “Dream Site” plants in Aichi — built in stages since 2013 — combine robot cells, automated transport, and scheduling software to build machine tools in high mix and low volume, with production lead times cut dramatically compared to conventional lines. The factories double as proof: the automation and connected-factory software Okuma sells to customers runs its own production floor first.

That matters commercially because the machine tool industry’s competition has shifted from standalone speed and precision to how well machines plug into automated, data-driven factories. Okuma’s answer — a machine, control, and factory software stack engineered as one — is the same argument that has served vertically integrated companies from Apple to Fanuc.

Okuma at a Glance

Why It Matters for Global Partners

For manufacturers weighing capital investment, Okuma’s single-source design lowers integration risk: accuracy compensation, collision protection, and monitoring arrive built in, which shortens the path from installation to stable production — especially valuable for plants short on experienced machinists. For investors, the in-house control is a moat that is nearly impossible to replicate; a competitor would need decades of control software development to match it. And for automation integrators and software firms, Okuma’s open approach to factory connectivity creates room for partnership around its large installed base of machines running in factories worldwide.

The Bottom Line

Okuma made an expensive decision in 1963: build the brain, not just the body. Sixty years later, as manufacturing converges on automation and data, that decision looks less like stubbornness and more like foresight. In a market where most machines think with someone else’s control, Okuma’s machines think for themselves — and that is exactly what the next generation of factories is buying.