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What is kaizen

Also known as: continuous improvement, daily kaizen, kaizen method, kaizen meaning, change for the better

Definition

Kaizen is the Japanese approach of continuous improvement in small steps: everyone makes small changes, and each change that works becomes the new standard.

Why it matters

Large overhauls are expensive and disruptive.

Common mistakes

Treating Kaizen as a top-down management program rather than involving all levels of staff.

Related terms

Worked exampleIllustration

A small kaizen in a hair salon

One change, tried for one shift, then written into the salon's checklist.

  1. The standard

    The salon's checklist says clean towels are kept on the shelf in the back room.

  2. The problem

    A stylist notices she walks to the back room for towels between every wash.

  3. The small change

    The team moves one towel shelf next to the wash basin for a trial shift.

  4. The check

    They time the walks for that shift and compare them with a shift before the change.

  5. The new standard

    The walks are shorter, so the new shelf place goes into the salon's checklist.

No budget and no project, just one small change. The next improvement starts from the new standard.

Small steps, each one held

5 small changes, each written into the standard before the next one starts. No budget and no project, and the level still climbs.⁨Time⁩⁨How well the work is done⁩
  • Kaizen: small, frequent, by everyone
  • Innovation: one big jump that needs investment
  • The standard holds each step in place

5 small changes, each written into the standard before the next one starts. No budget and no project, and the level still climbs.

Imai's pairing: PDCA lifts the way of working one small step, and SDCA holds it there as the new standard. Shapes only, no scale.

One small change in the salon

One towel shelf by the basin, tried for a shift. The walks are shorter, so the new place goes into the checklist.⁨Back room⁩⁨Wash basin⁩⁨The walk for⁩⁨towels⁩⁨Towels⁩

One towel shelf by the basin, tried for a shift. The walks are shorter, so the new place goes into the checklist.

The kaizen from the example: one change, one trial shift, then the new standard.

Definition

Kaizen is Japanese for change for the better, from kai, change, and zen, good. The word itself does not mean continuous, the continuity belongs to the practice: small, frequent improvements made by everyone, every day. Masaaki Imai, who founded the Kaizen Institute in 1985, brought the word into Western management with his 1986 book Kaizen: The Key to Japan's Competitive Success. Imai paired two cycles. SDCA (Standardize, Do, Check, Act) keeps the current way of working stable, and PDCA (Plan, Do, Check, Act) improves it. In his view, a process has to be standardized before it can be improved, because only then can you tell whether a change helped.

Why it matters

Kaizen works through small, low-risk changes, and the contrast between the two is widely attributed to Imai: kaizen is small, frequent and made by everyone, while innovation is large and needs investment. By asking every employee to find and fix small problems in their own work, a business steadily improves quality and reduces waste without large capital spending. Kaizen has limits, though. A broken business model will not be fixed in five-minute steps, and it needs a bigger decision first.

Directly related: PDCA, Gemba, 5S.

Improvement tips

  • Encourage frontline employees to suggest small changes, since they understand the work best.
  • Write each change that works into the SOP or checklist, so it becomes the new standard everyone follows.
  • Act quickly on small improvements rather than waiting for a perfect, expensive solution.

Common mistakes

  • Expecting immediate, massive financial returns from small individual improvements.
  • Failing to standardize and celebrate the small wins, which reduces team motivation.
  • Trying to improve a task that has no agreed standard yet, so nobody can tell whether a change helped.
  • Using small daily steps to fix a broken business model, which needs a bigger decision.

Related terms

OperationsIntermediate

PDCA

PDCA (Plan, Do, Check, Act) is a four-step improvement cycle: plan a change with a prediction, try it, check the result, then adopt the change or drop it.

OperationsIntermediate

Gemba

Gemba is Japanese for the actual place where work is done, like the shop floor, a counter or an inbox. It is where value is created, not where it is managed.

OperationsBeginner

5S

5S is a Japanese method for organizing a workplace in five steps: Sort, Set in order, Shine, Standardize and Sustain. It reduces waste and makes gaps visible.

OperationsBeginner

5 Whys

5 Whys is a way to find the root cause of a problem: you ask why it happened, then why again, usually about five times, until you reach a cause you can fix.

OperationsBeginner

Poka-Yoke

Poka-yoke (Japanese for mistake-proofing) means designing a process so an error cannot happen or is flagged at once, like a SIM card that fits only one way.

OperationsBeginner

SOP

An SOP (Standard Operating Procedure) is a written step-by-step guide to a routine task, so everyone gets the same result. It lists purpose, owner, steps, date.

Quick check

Which statement best describes the philosophy of Kaizen?

Choose an answer

Frequently asked questions

Do I need to adopt the Kaizen philosophy before I launch my startup?
You do not need to implement Kaizen before your launch because your main task is to build your first product and find customers. Focus on getting your business started rather than refining processes that are not yet running. You can start making incremental improvements once you have a steady flow of operations.
How can a new business owner use Kaizen principles from day one?
You can use these principles by building a habit of looking for small ways to simplify your daily work as you build the business. For example, if you spend ten minutes searching for files, spend five minutes organizing your digital folders. This focus on small improvements keeps your startup from building up waste.
Does Kaizen require a large budget for process improvement?
Kaizen does not require a large budget and is focused on low-cost, low-risk changes that you can make with your existing resources. Most improvements involve rearranging steps, cleaning workspaces, or simplifying templates, which cost little. It is about using creativity rather than capital to solve operational problems.
How do I plan for continuous improvement in my business plan?
In your business plan, show that you will allocate a small amount of weekly time for your team to review and improve their workflows. This demonstrates to potential partners that you are focused on efficiency and cost control as you scale. Keep this time simple and focused on practical daily adjustments.
How do I get my employees to care about fixing small inefficiencies?
Employees will care about efficiency when you encourage them to suggest changes that make their own daily tasks easier. If you only focus on top-down directives to cut costs, your team will resist the program. Celebrate and implement their ideas quickly to show that their feedback is valued.
Why do my process overhauls always cause chaos and employee resistance?
Large, sudden process overhauls are disruptive and often fail because they ignore the daily reality of your staff. Kaizen avoids this by focusing on small, incremental changes that are easy to test and adapt. These small adjustments cause very little disruption and are much easier for your team to accept.
How do I run a Kaizen event without stopping my business operations?
A kaizen event, also called a kaizen blitz, is a focused, time-boxed team effort on one process, which the Lean Enterprise Institute describes as typically three to five days. Pick a single, narrow process like invoice processing, and plan the days so customer service keeps running with part of the team. For most small businesses, daily kaizen, small changes by everyone as part of normal work, is the easier place to start.
How do I measure the financial return of many tiny process changes?
Track the return of small changes by measuring the time saved or the reduction in errors for the specific tasks you updated. While one small change might only save five minutes a day, ten of these changes across five employees add up to significant hours saved each month. This freed capacity allows your team to handle more customer volume.
What does Kaizen actually mean in simple terms?
Kaizen is a Japanese word that means change for the better, and in business it names the habit of improving through small, daily changes. Instead of making massive, expensive updates, you and your team look for small ways to make your work easier, safer, and faster every day. These small steps add up to major improvements over time.
Is Kaizen a complicated management system that only works in Japanese factories?
Kaizen is a very simple mindset that can be used in any business, from a local shop to a home office. It does not require factory equipment or complex Japanese terms to work. It is simply the habit of asking how you can make a task slightly better today than it was yesterday.
Do I need a professional coach to start using Kaizen in my small office?
You do not need to hire an expensive coach or consultant to start making small improvements. The people who do the work are the best ones to improve it because they see the daily challenges. Start by asking your team what small change would make their workday run smoother.
What is the difference between Kaizen and a regular business redesign?
A regular business redesign is a large, expensive project managed from the top down that tries to fix everything at once. Kaizen is an ongoing, bottom-up habit where everyone in the company makes small, low-risk improvements every day. Kaizen is continuous and collaborative rather than a one-time event.

Sources: Masaaki Imai, Kaizen: The Key to Japan's Competitive Success, 1986, Lean Enterprise Institute, Lean Lexicon: kaizen, Kaizen Institute (founded by Masaaki Imai in 1985)

Last reviewed: 2026-09-23

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