Between Shirogami #1 and Shirogami #3, the "better" steel depends entirely on your skill level and how you intend to use the knife.
The Core Difference
Shirogami #1 is the high-performance, high-carbon choice (1.25–1.35% Carbon). It is designed for maximum hardness and a laser-like edge.
Shirogami #3 is the entry-level or "workhorse" choice (0.8–0.9% Carbon). It focuses on toughness and ease of sharpening over raw cutting performance.
Comparison Table
Feature | Shirogami #1 | Shirogami #3 |
|---|---|---|
Edge Potential | Superior. Achieves a cleaner, sharper edge. | Great. Sharp, but lacks the "surgical" bite of #1. |
Edge Retention | Longer. Holds its sharpness for much longer. | Shorter. Dulls faster under heavy use. |
Durability | Brittle. Prone to chipping if you hit a bone or twist the blade. | Tough. Much more resistant to chipping and cracking. |
Sharpening | Demanding. Requires skill to maximize its potential. | Very Easy. The most beginner-friendly carbon steel to sharpen. |
Best For | Professional chefs and sashimi specialists. | Home cooks and heavy-duty tasks (like butchery). |
Which One Should You Buy?
Choose Shirogami #1 if: You want the highest possible performance from a carbon steel knife. It is the gold standard for Yanagiba (sashimi knives) because it can create a mirror-polished, incredibly fine edge that won't tear delicate proteins. However, you must be confident in your knife skills to avoid chipping the brittle edge.
Choose Shirogami #3 if: You are looking for a Deba (butchery knife) or a durable "beater" carbon steel knife. Because it is tougher and less brittle, it handles impact better. It is also an excellent choice if you are just learning how to use whetstones, as it sharpens very quickly and easily.
Summary Recommendation:
If you want the best cutting experience, go with #1. If you want a reliable, low-stress tool that is hard to break, go with #3.