Understanding the Four Japanese Blade Line Types
A working guide to the four blade line profiles used in Japanese hairdressing scissors, how each one affects your cutting feel, and which matches your technique.
What blade line means and why most Western training skips it
When Japanese scissor makers describe a blade, one of the first things they specify is the blade line, meaning the curvature profile of the cutting edge when viewed from the side. This is not the same as blade bevel or edge angle. Blade line is about the shape of the curve from pivot to tip.
Japanese scissor education recognises four distinct blade line types. Western cosmetology training typically covers two, sometimes three, and often treats them as minor variations rather than fundamentally different tools. If you trained outside Japan, there is a good chance nobody explained this to you.
Understanding blade line changes how you select scissors and how you use them. Each profile is optimised for specific cutting motions. Using the wrong blade line for a technique does not make the cut impossible, but it does make it harder than it needs to be.
The four blade line types
1. Straight blade (直刃, chokuba)
The chokuba has minimal curvature along the cutting edge. Viewed from the side, the edge runs nearly straight from pivot to tip with only a very slight arc.
Cutting character. A straight blade grips hair firmly across the full length of the edge. There is very little tendency for hair to slide along the blade during a cut. This makes the chokuba excellent for blunt cuts, one-length bobs, and any technique where you want the hair to stay exactly where you placed it between the blades.
Feel in the hand. Chokuba scissors feel “solid” during a cut. There is definite resistance as the blades close, and the cut is clean and decisive. Some stylists describe it as a satisfying “crunch.” Others find it requires more hand effort over a full day compared to curved blade lines.
Best for. Precision blunt cutting, one-length work, geometric shapes. If your primary technique is classic barbering or structured salon cuts, a chokuba is worth trying.
2. Willow blade (柳刃, yanagiba)
The yanagiba has a gentle, consistent curve along the cutting edge, similar to the profile of a willow leaf. This is the most common blade line in Japanese hairdressing scissors and the one you are most likely already holding.
Cutting character. The curve creates a progressive cutting action. Hair contacts the blade at slightly different angles along the edge length, which distributes cutting force more evenly. The yanagiba offers a balance between grip (holding hair in place) and release (allowing controlled movement along the blade).
Feel in the hand. Smooth and versatile. Most stylists find the yanagiba comfortable for extended use because the progressive cut requires less peak force than a straight blade. It works well across a range of techniques without excelling at any single one.
Best for. General salon work. If you only own one pair of scissors, a yanagiba blade line is the safest all-round choice.
3. Bamboo leaf blade (笹刃, sasaba)
The sasaba has a more pronounced curve than the yanagiba. The name refers to the bamboo leaf (笹, sasa), which has a wider, more defined arc than a willow leaf.
Cutting character. The increased curvature means less hair contact at any given point during the closing action. Hair tends to move along the blade more easily, which is exactly what you want for slide cutting (すき鋏, sukibasami techniques). The sasaba is optimised for movement based cutting where the blade travels through hair rather than trapping it.
Feel in the hand. Lighter resistance than chokuba or yanagiba. Some stylists feel like the scissors are “releasing” hair rather than cutting it. This feels wonderful for texturizing work but can feel imprecise if you are trying to hold a strict blunt line.
Best for. Slide cutting, point cutting, and texturizing techniques where you want the hair to move freely along the blade.
A note on the yanagiba/sasaba distinction
Kouho Scissors has publicly questioned the commonly accepted distinction between yanagiba and sasaba blade lines. Their position is that there is no official angular definition separating the two profiles, and that the boundary between “willow” and “bamboo leaf” curvature is subjective rather than standardised. This is a legitimate point. Different manufacturers may label the same curvature differently depending on their internal standards.
In practice, the distinction still matters becuase it describes a real spectrum of cutting behaviour. Even if the exact boundary is debatable, the difference in feel between a gently curved blade and a pronouncedly curved blade is something you will notice immediately in the hand.
4. Sickle blade (鎌刃, kamaba)
The kamaba has an extreme curve, resembling the arc of a sickle (鎌, kama). This is the most specialised of the four blade lines and the least common in general salon work.
Cutting character. The aggressive curve means hair slides along the blade very easily. There is almost no gripping action. The kamaba is a pure texturizing tool. It excels at dry cutting techniques where you want maximum hair movement and minimal resistance.
Feel in the hand. Very light, almost effortless closing. The scissors feel like they are barely touching the hair. This is by design. A kamaba used for blunt cutting would produce a ragged, uneven line because the blade cannot hold hair still.
Best for. Advanced texturizing, dry cutting, and specialty finishing techniques. This is not a beginner’s blade line. It requires confident technique because the blade offers almost no correction. What you cut is what you get.
How to identify which blade line you have
Hold your scissors at eye level with the blades closed. Look along the cutting edge from the pivot end toward the tip. Compare what you see to these profiles:
- Chokuba: The edge looks almost straight. A ruler held against it would show minimal gap.
- Yanagiba: A gentle, even curve. The gap between a straight ruler and the edge would be small and consistent.
- Sasaba: An obvious curve. The ruler gap would be noticeably larger, especially in the middle third of the blade.
- Kamaba: A dramatic arc. The blade tip may curve away from centre significantly.
If you are still not sure, check the manufacturer’s specifications. Most Japanese makers list blade line type in their product data, though they may use their own terminology. Some use numbering systems instead of the traditional names.
Matching blade line to your technique
Ask yourself: what do I do most of the day?
If 70% of your cuts are blunt, structured work, start with a chokuba or yanagiba. If you are primarily doing layered cuts with slide and point cutting, look at a yanagiba or sasaba. If you specialise in dry cutting or advanced texture work, the sasaba or kamaba will feel like they were built for your hands.
Most working stylists benefit from owning at least two blade lines. A yanagiba for general work and a sasaba for texture work covers the majority of salon situations. Adding a chokuba for precision work and a kamaba for specialty finishing gives you the full toolkit, but that is a significant investment and only makes sense if your workload genuinely spans all four technique categories.
Do not buy a blade line because it sounds advanced. Buy the one that matches what you actualy do. A student who only cuts blunt lines does not need a kamaba. A texture specialist does not need a chokuba. Match the tool to the work.