Knowledge · Leadership & Organization

Johari Window

Johari Window

📂Leadership & Organization⏱2-min read📊Beginner🔗5 related

What Is the Johari Window?

In one line
A model that divides self-awareness into four areas based on what you and others know or don’t know, showing that widening the 'open window' through self-disclosure and feedback is the key to communication.
Bring this topic in-house📚 Related Course💬 Message Us
⚡ Summary in 3 lines
  • Four areas based on what you and others know
  • Widen the “open” window through self-disclosure and feedback
  • Without psychological safety, the window actually closes

What the Johari Window really changes is how you see the cause of conflict. People tend to close the matter with “that’s just how that person is,” but this model recasts the same situation as information being concentrated on one side. Personality is hard to change, but the distribution of information can shift with a single remark or question. The discussion moves from “who is the problem” to “who doesn’t know what.”

The size of the four areas is not a fixed trait of a person; it changes from relationship to relationship. The same person has a wide open window with a colleague of ten years and a wide hidden window with a manager who started this week. If MBTI or DISC sorts people into types, the Johari Window is closer to a map redrawn for each relationship. You also need to be clear about its scope. The blind window is limited to outwardly observable behavior such as verbal habits in meetings, facial expressions, and response speed; guesses about personality or inner feelings don’t belong here. The unknown window is not something a half-day workshop can open; that takes long-term coaching and experience.

The most common failure in practice is turning self-disclosure into confessions about private life. When a facilitator, trying to liven things up, has people share family or dating stories, nothing useful for work is gained and all that remains is material for gossip. Once those stories start circulating in the break room the next day, the whole team clams up again, and from the next workshop on, no one in that organization says anything real. The order is also often reversed. If leaders share nothing and only ask team members to open up, members read the session as a demand for confessions disguised as evaluation. Disclosure should start at the top and stay limited to work behavior.

Training that covers this term · HR & Leadership
Recommended courses · Recommended instructors · Quick quote
🧮 Mini quote · Based on instructor fees
About KRW 1.2 million (≈ US$900)2-hour talk · up to 20 people · Korean
Get a quote for these requirements →
💡 In plain English
It is like a car’s blind spot. The driver can’t see it, but it is perfectly visible to the person in the next lane. So unless someone tells you, you never find out.
Why it matters in practice
For communication training to be more than a list of techniques, it needs a starting point: 'How well do I know myself?' Done as a team, it brings the relationships within the team into view.
Origin and sources

Developed in 1955 by American psychologists Joseph Luft and Harrington Ingham during their group dynamics research. The name “Johari” combines their first names, Joseph and Harrington.

Source · Joseph Luft · Harrington Ingham (1955) · View original
An example

Consider a hypothetical case. Company A, a battery-component maker with 320 employees, formed an eight-week task force (TF) to cut defect rates, drawing nine people from Production, Quality, and Purchasing. By week 3 they had held five meetings, and every one ended with the decision pushed to the next. Word was spreading to their home departments that “we can’t tell what the TF leader is thinking.” The TF leader requested a half-day workshop.

  1. Kim, the team lead in Production Engineering, spoke first. “When I get a report without numbers, my face stiffens. If that looked like anger, that’s on me,” Kim said, with the leader opening up first about their own habits.
  2. Nine people each filled in three boxes on an A4 sheet — “conditions where I get absorbed,” “signals I give off under stress,” and “how I like to communicate” — and posted them on the wall. Manager Lee from Purchasing wrote: “For urgent matters, call me instead of messaging.”
  3. Feedback was limited to behavior people had directly observed in the past 3 weeks, two notes per person. Participants wrote only the observed fact and its impact, such as “spoke for the first 10 minutes of the meeting, then stayed silent for the remaining 50.”
  4. When people put red stickers on the notes that surprised them, “interrupts others” turned up on five of the eight notes in front of Team Lead Kim. It was the first time Kim had heard it.
  5. Park, an HR manager, posted a two-line team rule on the meeting room wall: “The last 5 minutes of a meeting are for feedback; rebuttals wait a day.” The team agreed to check every Friday morning that it was being followed.
  6. Eight weeks later, the task force had cut the defect rate for that process from 2.4% to 1.1%, and average meeting time fell from 95 to 55 minutes. In an internal survey three months later, agreement with “people can speak candidly on our team” rose from 44% to 78%.
Related terms
Training linked to this term
📚CommunicationNanum Consulting corporate training · In-person/OnlineView course →
Need in-house training on this topic?
Get a curriculum and quote tailored to your needs right away.
Ask About Training
Last updated 13 Sep 2026 · Reviewed by John Kim

FAQ

It isn’t a standardized psychological test but a conceptual model that explains self-awareness. Unlike type assessments such as MBTI or DISC, the result isn’t a type.
To widen the open window by shrinking the hidden and blind windows. Self-disclosure and asking for feedback are the respective means.
The blind window. As rank rises, candid feedback declines and leaders lose sight of the real impact of their words and actions. 360-degree feedback and reverse mentoring help fill the gap.
You shouldn’t force it. Let each person decide how much to open up, and widen it naturally once psychological safety has built up; that approach lasts.