Kurutoga KS Model vs Kurutoga Upgrade Model - Note and Nib

Kurutoga KS Model vs Kurutoga Upgrade Model

Kurutoga KS Model vs Kurutoga Upgrade Model

What’s the real difference, and which one should you buy?

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If you’re choosing between the Mitsubishi Uni Kurutoga KS Model and the Kurutoga Upgrade Model, you’re already in good territory. Both use Uni’s clever rotating lead mechanism that keeps your writing sharp. The differences are about feel, precision, and build, not gimmicks.

What both pencils do (the basics)

Both pencils use Uni’s Kurutoga engine, which rotates the lead slightly every time it lifts off the page. The result:

  • Consistent line width

  • Cleaner writing, especially in small text

  • Less lead breakage on one side

So no matter which one you choose, the core benefit is the same.

Kurutoga KS Model – simple, light, affordable

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The KS Model is the newer entry-level Kurutoga. It replaces older basic models and focuses on comfort and value.

Key points:

  • Lightweight plastic body

  • Comfortable rubber grip

  • Standard Kurutoga rotation speed

  • Clean, minimal design

  • Excellent everyday pencil

Who it’s for:
Students, casual writers, note-takers, or anyone who wants Kurutoga tech without paying extra.

Reality check:
It does the job well, but it doesn’t feel premium. If you press hard or write very fast, you may notice a slight wobble at the tip.

Kurutoga Upgrade Model – tighter, sharper, more controlled

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The Upgrade Model is aimed at people who care about precision. It uses a refined version of the Kurutoga mechanism.

Key points:

  • Faster lead rotation than the KS

  • Metal internal parts for stability

  • Much less tip wobble

  • Slimmer, more technical feel

  • Better for neat handwriting and fine detail

Who it’s for:
Students doing dense notes, people with small handwriting, stationery enthusiasts, or anyone annoyed by shaky pencil tips.

Reality check:
It costs more, and the grip is firmer. If you prefer very soft grips or ultra-light pencils, it may feel a bit serious.

Side-by-side comparison

Feature KS Model Upgrade Model
Lead rotation Standard Faster
Tip stability Good Excellent
Grip Soft rubber Firm, controlled
Weight Light Slightly heavier
Feel Casual Precise
Typical price (EU) Lower Higher

Which one should you buy?

  • Buy the KS Model if you want a reliable everyday mechanical pencil that’s comfortable and good value.

  • Buy the Upgrade Model if you care about precision, write small, or get irritated by tip movement.

Neither is “better” overall, they’re built for different users.

Final thoughts

The Kurutoga system itself is the star here. If you’re upgrading from a basic mechanical pencil, the KS will already feel impressive. If you’re already deep into Japanese stationery, the Upgrade Model will feel worth it.

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