When most people think of the Toyota Production System (TPS), they picture a highly optimized, mechanical assembly line. They think of tools like 5S, Kanban cards, or visual management boards.

But according to Darril Wilburn—a former Toyota leader, global pilot designer for the Toyota Business Practice, and senior partner at Honsha—treating Lean like a mere checklist of tools is exactly where most companies trip up.

In a recent episode of the KPI Fireside podcast, hosted by Keith Norris, Wilburn broken down why true operational excellence isn’t found in your cleaning tape or structural frameworks. It is forged in the human elements of your culture: Courage, Humility, and Kaizen.

1. The Paradox of Lean Leadership

Many Western organizations like to fix contradictions. We want clear, singular rules. However, Wilburn explains that Toyota’s culture thrives on keeping a healthy tension—or paradox—alive.

In the classic TPS framework (often stylized as a house or a traditional Japanese Torii gate), two opposite pillars support the structure.

  • Just-in-Time (Flow): Keeping the work moving forward seamlessly.

  • Jidoka (Stop): Intentionally halting production the exact moment a quality or safety issue occurs.

These two concepts pull against each other. An executive Wilburn spoke with summarized this balance perfectly: “Our message to team members is to stop the line if needed. Our message to management is never stop the line.”

Managing this tension requires leaders to think strategically and stay comfortable in the gray areas, ensuring that the push for speed never replaces the absolute commitment to quality.

2. Redefining “Respect” and “5S”

One of the biggest eye-openers in the interview is how easily core cultural tenets get lost in translation when Western businesses adopt Japanese practices. Wilburn highlights two examples:

The Misunderstanding of 5S

To many managers, 5S is simply a glorified housekeeping project. Tape down the floors, organize the desks, and sweep up.

But at Toyota, cleanliness is merely a byproduct. The true purpose of 5S is to design an environment that perfectly supports your cycle time. If a worker has to break their flow or struggle to find a part, the system is failing. Wilburn recalls visiting a decades-old stamping plant in Japan. It wasn’t pristine, but the work design was flawless. Yet, a Western observer dismissed it via video because “the 5S was no good”. They missed the forest for the trees.

What “Respect” Actually Means

In casual environments, respect means being polite. In the Toyota Way, respect takes on a deeper, more grueling form:

  1. Work Design: Respecting someone means designing their job so they can perform value-added tasks smoothly without constant, exhausting interruptions.

  2. Rework as Mentorship: True respect means not letting substandard work slide. When a coach gives you back an A3 problem-solving sheet covered in red ink over and over again, it is painful. But they are investing their time into your professional growth.

3. Why Transformation Efforts Fail (The Hip-to-Hip Trap)

When Toyota built its massive manufacturing plant in Georgetown, Kentucky, they deployed an army of Japanese coordinators to shadow local managers “hip-to-hip”. It worked beautifully at first, but Wilburn notes that Toyota eventually realized this model was a structural failure because it wasn’t sustainable.

When the trainers rotated home, productivity and quality dipped. Every trainer had a slightly different way of teaching based on who their own mentor had been.

The Lesson: You cannot rely entirely on individual “master gurus” to save your company culture.

To solve this, Toyota pivoted to global standardization of curriculum. By creating uniform, structured problem-solving templates (like the Toyota Business Practice) and floor management development systems, they built a shared language. If a manager transfers from Kentucky to a plant on the other side of the world, they can instantly look at a visual board, grasp the situation, and begin coaching—even if they don’t speak the native language fluently.

4. Preparing the Soil: Nemawashi

If you want change to stick, you can’t simply dictate it from a corner office. Wilburn points to the Japanese concept of Nemawashi (根回し), which literally translates to “preparing the soil for transplanting”.

Instead of pushing an idea forward by force, a lean leader passes it around, letting teammates contribute, tweak, and add to it. By the time the process is actually implemented, everyone owns a piece of it, and the soil is ready to feed it long-term.

The Ultimate Lean Question

At the end of the day, whether you are utilizing highly advanced automated AI systems or basic manual workflows, the core of continuous improvement remains remarkably simple. When asked for his favorite tool or practice, Wilburn didn’t quote a complex formula. He pointed straight to a fundamental question:

“What problem are you trying to solve? Where is the gap?”

If your leadership team can stay focused on that question, embrace the humility to accept feedback, and show the courage to change standard practices, the tools will naturally find their place.

For more insights into Darril Wilburn’s work and his upcoming book, “Courage, Humility, Kaizen,” visit honsha.org or connect with him directly on LinkedIn.