Between Aogami #1 (Blue #1) and Aogami #3 (Blue #3), Aogami #1 is the superior high-performance steel, while Aogami #3 is a niche choice focused on durability and ease of use.
For a primary chef's knife, Aogami #1 is almost always considered "better."
Quick Comparison: Aogami #1 vs. Aogami #3
Feature [3, 4, 5, 6, 7] | Aogami #1 (Blue #1) | Aogami #3 (Blue #3) |
|---|---|---|
Carbon Content | High (1.25–1.35%) | Lower (0.80–0.90%) |
Edge Retention | Superior. Best for long shifts. | Good, but needs more touch-ups. |
Hardness (HRC) | 63–65+ | 58–61 |
Toughness | Brittle; requires care. | Very High. Hard to chip. |
Sharpening | Takes time but reaches a "laser" edge. | Very Easy. Fast feedback. |
Price | Premium. | Budget-friendly. |
Detailed Analysis
Why Aogami #1 is "Better" (Performance)
Edge Life: With nearly 50% more carbon than #3, Aogami #1 creates a much larger volume of hard carbides. This means it can stay "shaving sharp" for much longer during heavy kitchen work.
Peak Sharpness: Because it can be hardened significantly more, it supports a much thinner, more acute edge angle. This allows the knife to glide through food with less resistance.
Why Aogami #3 is "Better" (Utility)
Resilience: It is essentially a "workhorse" steel. Because it is less hard, it is much more "springy" and less likely to chip or crack if you accidentally twist the blade or hit a hard surface.
The Beginner's Carbon: If you are transitioning from soft Western stainless steel knives, Aogami #3 is a safer entry point into Japanese carbon steel because it isn't as fragile as the #1 grade.
The Verdict
Choose Aogami #1 if you want a professional-grade tool and you are confident in your knife skills. It is the better choice for Gyutos (chef's knives) and Yanagibas (slicers).
Choose Aogami #3 if you want a durable, low-stress carbon steel knife for heavy-duty tasks or if you are on a strict budget.