[Thursday, April 9 Free Seminar] "Just 'asking 5 times' is not enough: The correct practice of Toyota's 'Why-Why Analysis' - A thinking model to structurally unravel problems" (Hosted by Stockmark)

Stockmark will host a free online seminar on April 9 featuring former Toyota expert Masamitsu Ito, teaching the true structural problem-solving methods behind the 'Why-Why Analysis.'
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  • 📰 Published: April 6, 2026 at 19:00
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Stockmark Inc. will hold an online seminar titled "Just 'asking 5 times' is not enough: The correct practice of Toyota's 'Why-Why Analysis' - A thinking model to structurally unravel problems."

▼ Seminar Details and Registration ▼
https://aconnect.stockmark.co.jp/seminar/20260409/

## Seminar Overview
"Why-Why Analysis" is widely used in manufacturing workplaces and is famously practiced by Toyota.
In many workplaces, it is understood simply as a method of "repeating 'why?' five times."

However, the true Why-Why Analysis is not just about repeating the question.

If you only formally repeat the question, you may arrive at an "easy-to-explain reason" rather than the true root cause. That is different from the Why-Why Analysis practiced at Toyota.

So, what is missing?
What kind of thought process is necessary to reach the true root cause?

In this seminar, we welcome Mr. Masamitsu Ito, who was involved in practical workplace education as a training instructor for the "Why-Why Analysis" at Toyota Motor Corporation for many years, to explain the original concept and correct practice based on his practical experience.

- Why "5 times" is insufficient
- The difference between a true root cause and a contributing factor
- What is a "structural question" that prevents recurrence
- Perspectives needed to prevent the framework from becoming a mere formality

Moving from a state of "knowing" the Why-Why Analysis to a state of truly "mastering" it.

This seminar is highly recommended for those who thought "just repeating it 5 times is fine" and those who want to improve the accuracy of their root cause investigations.

## Recommended for the following people:
- Those involved in analyzing the causes of defects occurring in development, design, and production sites
- Those who feel the need to uncover the "true root cause" of troubles and rework
- Those who use the "Why-Why Analysis" but feel it has become just a formality
- Those who want to establish problem-solving thinking in their workplace and team

## Speaker
Mr. Masamitsu Ito
Former Top Technical Expert at Toyota Motor Corporation / Instructor at Real Partners
Joined the Toyota Motor Corporation Technician Training School (currently: Toyota Technical Skills Academy) in 1968.
Afterward, he worked in Prototype Section 2 of the Engineering Dept., Vehicle Assembly Section of the Prototype Dept., and Prototype