初心海神（Kaijin），雖然名氣響亮，卻是相當親民的門級刀款。外觀簡約，有拋刃口與噴砂斜面，沒有額外設計。但說，如果你下一把刀的選購重點在於性能表現，這把刀以極競爭力的價格提供了難以的實用性。



一把優秀切菜刀的關鍵，在於能銳利食材的刃口，以及讓刀刃順暢穿透並輕鬆脫離食物的斜面幾何結構。海神在這方面都表現得相當出色。鋼材選擇的是日立所生產的青鋼二號，一種常見的碳鋼，極「咬合力」的刃口著稱。這種刃口能輕鬆切開柔軟食材如蛋白質，也能應付硬表面如皮膚層，是不鏽鋼刀無法提供的切割體驗。



簡單碳鋼的神奇之處在於：它們可經熱處理至較高硬度，同時仍保有比大多數傳統不鏽鋼更佳的韌性。這意味著即使刃口磨得極薄，也能維持良好性能。海神正是如此設計——斜面被研磨至刃緣附近極為纖薄，並逐漸加厚，轉換成片平行表面。這種凸面研磨與刃背極薄的結構，是實現順暢穿透與食材釋放的核心關鍵，而海神也完美展現了這一點。雖然偶爾會有極薄切片黏附在刀身平面區域況，但整體表現仍優於我們測試過的大多數土豆切割刀款（除部分手工研磨複雜斜面外）。



最新染色穩定處理的藍色捲紋楓木刀柄，以及的不鏽鋼護手環。這款現代感十足的刀柄視覺搶眼，更提升了耐用性與平衡感，我們將詮釋為「海洋」的象徵，為整把刀增添極高價值，打造出精緻完整的整體裝。



儘管海神採用碳鋼芯材，但由於外層夾層為不鏽鋼，因此仍備相當實用性。此系列的主要缺點在於需花費少量時間維護——保持裸露的芯鋼乾燥潔，以及刃口較為脆弱、無法承受過度衝擊。我推薦這款刀給已有初階VG10不鏽鋼刀使用經驗的人士，若想升級至碳鋼刀，海神系列能提供理想的順滑切割體驗，同時將保養難度與成本控制在極可管理的範圍。

The key in a good cutting knife is the combination of an edge that cuts aggressively and a bevel geometry that penetrates and releases off food smoothly, and Kaijin does both fairly well. The steel choice is Blue No.2, a common carbon steel produced by Hitachi that excels at producing a really “bitey” edge. This type of edge can slice open soft items like proteins and tough surfaces like skins, and it’s an experience that stainless steel just couldn’t deliver. 

The magic of simple carbon steel is, they can be heat treated to a higher hardness and still retain a more decent toughness than most of the conventional stainless steel, this means they can perform when the edge gets pretty thin. In this case, it is exactly what Kaijin did. The bevel of Kaijin gets sharpened to a very low thickness near the edge, and this thickness gradually increases, transitions into two parallel surfaces. This type of convex grind and an extremely low thickness behind the edge is the key in delivering a smooth food penetration and food release, and it’s not an exception in the case of Kaijin. Although in some cases the very thin slice of food would stick to the flat zone of the blade, this still outperformed most of the knives we’ve tested on potatoes outside of the ones with more complicated hand grinded bevel.

Completing the package is the latest dyed and stabilized blue curly maple handle, paired with an elegant stainless steel ferrule. This modern handle not only looks striking but also improves durability and balance, it is our interpretation of "the ocean", adding significant value and complete the blade into one refined package.

Despite the carbon steel core used on the Kaijin, I still consider it as a rather practical line as the cladding is stainless. So the downside of the line really is the small amount of care needed to keep the exposed core steel dry and clean and a rather delicate edge that can’t handle much of a beating. I recommend this knife to anyone who already has some experience on an entry level VG10 or other stainless steel, and looking to upgrade into a carbon steel. This Kaijin line would deliver the desired smooth cut while keeping the maintenance and cost very manageable.