Blade Line Types
Understanding choku-ba, sasa-ba, and yanagi-ba — how blade line curvature affects cutting technique and hair movement.
Blade Line Types
The blade line is the curvature of the cutting edge when you look at a scissor from the side — the path the edge follows from pivot to tip. It is distinct from the blade type (sword, willow, etc.) and the blade cross-section (hamaguri, dan-ba, etc.), though all three interact to define how a scissor feels in the hand.
Japanese manufacturers classify blade lines into three families: straight (直刃 choku-ba), bamboo leaf (笹刃 sasa-ba), and willow (柳刃 yanagi-ba). Each line shape changes how hair feeds across the edge, how much pressure the stylist needs, and which techniques the scissor excels at.
Quick look
- 直刃 Choku-ba (straight): Minimal curvature. Predictable, decisive cuts. The default in Western and barbering shears.
- 笹刃 Sasa-ba (bamboo leaf): Moderate curve, widest at the centre. Purpose-built for slide and stroke cutting.
- 柳刃 Yanagi-ba (willow): Gentle, consistent arc from pivot to tip. The all-rounder — competent across most techniques.
Why it matters
Blade line determines how much of the cutting edge engages hair at any point during the close. A straight line contacts hair evenly and produces clean, blunt results. A curved line shifts the contact point progressively, allowing hair to slide along the edge for softer, textured finishes. Choosing the right blade line for your dominant technique prevents unnecessary hand fatigue and delivers better results with less effort.1,2
Technique map
| Technique | 直刃 Choku-ba | 笹刃 Sasa-ba | 柳刃 Yanagi-ba |
|---|---|---|---|
| Blunt cut | ★★★★★ | ★★★☆☆ | ★★★★☆ |
| Slide cut | ★★☆☆☆ | ★★★★★ | ★★★★☆ |
| Point cut | ★★★★☆ | ★★★★☆ | ★★★★☆ |
| Scissor-over-comb | ★★★★★ | ★★★☆☆ | ★★★★☆ |
| Stroke cut | ★★☆☆☆ | ★★★★★ | ★★★☆☆ |
| Dry cut | ★★★☆☆ | ★★★★★ | ★★★★☆ |
| Versatility | ★★★☆☆ | ★★★☆☆ | ★★★★★ |
Important distinction
Blade line is independent of blade cross-section. You can have a straight blade line with a hamaguri (clam-shaped) cross-section, or a bamboo leaf line with a bevelled cross-section. Both variables affect cutting feel but in different ways — line curvature governs how hair moves along the edge, while cross-section governs how the edge enters the hair.
Related topics: Blade Types • Edge Types • Blade Cross-Section
Sources
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