Kujira Whale Knives

Yes. Despite their playful, toy-like appearance, these are functional tools forged from high-carbon steel. They are sharp enough for light utility tasks like opening packages, cutting twine, or simple craft projects.

Yes. High-carbon steel is prone to rust if left wet or dirty. To keep them in good condition, wipe the blades clean and dry them immediately after every use, and consider applying a light coat of food-safe mineral oil if you live in a humid environment.

While originally designed for children, these are real, sharp knives, not toys. Adult supervision is strongly recommended if children are using them, as the blades are fully functional and require careful handling.

Because the blades are made of high-carbon steel, they can be sharpened using standard sharpening stones or a honing rod. The dual-sided edge makes them relatively straightforward to maintain with basic sharpening techniques.

The black-forged finish, known as 'kurouchi' in Japanese blacksmithing, is the natural oxidized layer left on the steel after the forging process. It provides a rustic aesthetic and some protection against corrosion, though it may develop a patina or show minor wear over time with frequent use.