Japanese traditional performance art “Nou.” Efficiency. Multi-skilled operator. Capacity. At first glance, these sound like random, unrelated words. One belongs to the world of theater and culture. Another to industrial engineering. Another to HR or operations. Yet in Japanese, they all share the same character: 能, pronounced Nou. Once we notice this, we can start to learn something important about how we think about people, work, and improvement. The interesting character 能

When Japan imported the concept of “efficiency,” as with many other ideas, we expressed it in Kanji. Interestingly, there are two distinct “efficiencies” in Japanese. The second symbol in both idioms represents rate, ratio, or percentage. Therefore, the distinction between the two idioms lies in the first symbol, which we will explore further. Understanding these symbols will empower you to apply the concept of efficiency in practical contexts. 🔹 Kou-Ritsu 【効率】: Efficiency a

Many people rush to emulate Toyota’s tools. Kanban cards. Andon cords. Standardized work templates. We see the visible artifacts, assume they are the secret, and hurry to copy them. But before we do that, it’s worth asking a simple question: What is a “tool”? What “Dougu” Really Means In Japanese, a tool is called “Dougu.” It’s written with two characters: Dou【道】 – the way, the path, the Tao. Gu【具】 – the material, to equip, to be prepared. Put together, Dougu is not “just a t

トヨタ自動車労働組合. (2025, December 16). 2026年度_豊田（本社）＆工場カレンダー. https://www.kabanet.org/infos/toyota_calender/628 [Red Box is Japanese national holiday. Red letter is Toyota holiday.] For decades, Japan’s automobile industry has quietly followed its own unique rhythm of work and rest: the automobile calendar, often nicknamed the Toyota calendar. On May 22, the Japan Automobile Manufacturers Association, Inc. (JAMA) announced that it will end this long-standing practice. This decision

There is a lot of excitement right now about AI and humanoid robots handling operational work. Videos of humanoids walking through factories, picking up parts, or turning parts are spreading quickly. It’s easy to imagine a future where we simply drop these robots into our existing operations and let them handle everything. But although the technology is exciting, we need to cool down a bit. New technology does not automatically translate into better operations or business res

In Japan, we have a phrase, “Government ponchi-e,” which is sometimes compared to a mandala. It refers to the overly complicated, everything-in-one-place charts you often see in government documents and policy presentations. At first glance, these diagrams can look impressive. They feature colorful arrows, boxes, icons, and detailed labels, all packed onto a single sheet—usually A3. They give the impression that “everything is covered” and that a huge amount of work has been

“資料と紙量と死量” (documents, paper volume, and dead volume) is a well-known phrase from Taiichi Ohno, the architect of the Toyota Production System. They sound similar (All read as “Siryou”), but the idea is very simple: • The more documents 【資料】 you create, • the more paper volume 【紙量 / information】 you generate, • and eventually it becomes “dead volume” 【死量】 that kills the work. In other words, too much information actually prevents work from moving forward. I’ll apply this phras

The Muda of Waiting: What “Temachi” Really Means In the Toyota Production System, we often talk about muda. One important type is the muda of waiting. But the original Japanese term that Taiichi Ohno used is a bit more nuanced: “temachi” 【手待ち】. Let’s unpack that. What Is “Temachi”? 手待ち The word temachi is written as: • 手 (te) – hand • 待ち (machi) – wait Literally, it means “waiting hands.” In a production or work context, this is when hands — people, machines, or resources — a

過則勿憚改. 
“When you realize you have made a mistake, do not hesitate to correct it.” 
— Confucius This short saying from Confucius captures the essence of Kaizen, the Japanese philosophy of continuous improvement. In modern business, Kaizen is often associated with factories, productivity, and efficiency. But at its core, it is more human: it is about having the courage to recognize mistakes, learn from them, and keep improving. In this post, we will explore the importance of K

“No standard, no improvement.” This simple phrase sits at the heart of the Toyota Production System. Yet in many workplaces, we face a very real problem: what do we do when there is no standard to begin with? No clear process. No visual guide. No shared understanding. In that situation, trying to improve is like renovating a house that exists only in someone’s imagination. There is nothing concrete to inspect, question, or change. So where do we start? When There Is No Standa

Why I Hate the Slogan “Quality Is Everybody’s Responsibility” There’s a phrase that sounds right, feels right, and gets repeated in conference rooms, posters, and training decks everywhere: “Quality is everybody’s responsibility.” And yet—on the shop floor, in projects, in real life—it quietly does more harm than good. Let’s be honest about why. --- 1️⃣ When Everybody Owns It, Nobody Owns It. The slogan suggests inclusiveness. In reality, it creates ambiguity. If quality is “

On social media, you’ll often see the claim that “Poka‑yoke” was invented by Shigeo Shingo. That statement is only half the story. When we go back to Shingo’s own writing, the picture is more nuanced and far more interesting than a simple “he invented a word” narrative. From “Foolproof” to “Poka‑yoke.” Shingo himself described Poka‑yoke as: “Basically, it is the same line of thinking as ‘foolproof,’ which was thought to apply only to safety issues.” The English word “foolproo

When discussing the concept of “Just In Time” (JIT), we should first examine a key moment in Toyota’s history. In 1950, Toyota was reorganized into two main entities: a Sales company and a Manufacturing company. Let’s take a closer look. 1️⃣ Impact on manufacturing The separation was sparked by Toyota's financial crisis. One issue was the rollout of monthly installment sales. As Japan shifted to a market economy after WWII, automobiles became a free-market commodity. Toyota a

I was reading an old 1922 article about a factory in Osaka, Japan, that had a standard work bulletin board. This shows that standard work bulletin boards have been valued for many years, well before Taiichi Ohno. To evaluate the enduring relevance of standard work bulletin boards, I will analyze the article in greater detail. The company, Dainippon Boseki Co., Ltd. (now Unitika), used a standard work bulletin board. The board showed workers, roles, key points, and backups. Fo

It’s Not a Task List, It’s a System In a complex world, trying to remember every repeated step under pressure all the time is impossible. That’s why the most advanced organizations don't rely on "working harder" or "paying more attention." They rely on the checklist. Is a checklist a perfect solution? Absolutely not. Does that mean we should abandon them? Abandoning them and living with forgetfulness and mistakes is impossible. Just because it is not perfect, abandoning it an

Changeover. In Japanese, it’s Dantorikae 【段取り替え】 or Dandori 【段取り】 for short. This word has always puzzled me — not because it’s hard to say, but because of what it actually means. Most people involved in manufacturing know the word as a technical term: the process of switching a machine or production line from one product to another. However, the word itself has a much richer history, one that dates back to classical Japanese theater, Kabuki. Once you understand its origin, y

We often hear statements like “the operator’s mistake is not the root cause.” But why do we only focus on the operator’s mistake? We tend to avoid discussing management’s mistakes or act as if those mistakes don’t exist. Just because we don’t acknowledge them doesn't mean they’re not there. In reality, there are many examples. Yet, these mistakes pretend they didn’t happen; instead, we blame others—“Oh, the market,” or “the government,” etc. Despite spending millions of dolla

The fifth ’S’ of the 5S is Shituke. “Shitsuke” should be translated as discipline. By the way, for some reason, in the English version of “Workplace Management,” by Taiichi Ohno, discipline disappears from the title of the chapter that talks about 5S. The original Japanese version has Shitsuke in the title. According to Merriam-Webster, discipline is defined as follows; 1-a. control gained by enforcing obedience or order b. behavior in accordance with rules: orderly conduct c

When it comes to management by objectives and management by policy, there is concern that top management will treat them too lightly, simply setting objectives and policies, and will fall into the trap of spiritual control, telling employees to “work hard, work hard,” rather than adopting scientific management. むしろ目標管理、方針管理というと、トップは安易に考えて目標や方針だけ示してあとは頑張れ頑張れという精神的管理に陥り、科学的管理になってこない心配がある - Kaoru Ishikawa How often do we see this “spiritual control” when telling an employee to w

The two “pillars” of the Toyota Production System are Jidouka and Just-in-Time. “Pillars.” Because Taiichi Ohno explained this in such a way, we see visuals of the house of TPS. It is essentially pulled by the perception of the “pillar” and resembles a Greek temple. The trend continues: you will see something like eight (or more) pillars of TPM, etc. There is a perception that the more pillars we have, the better our ‘temple’ looks. A thought. In Japanese Shintoism, a pillar