☆ This is a knife modified for spearfishing. "Modify" means to correct, to slightly (partially) change, or to modify. ■ Dagger Knife Consideration Due to the revision of the Sword and Firearms Control Law following the random stabbing incident in Akihabara, Tokyo in June 2008, dagger knives with symmetrical blade shapes were banned from sale/purchase/possession. Therefore, it is presumed that spearfishing enthusiasts in Japan are reluctantly substituting with diver's knives. The reason spearfishermen around the world use dagger knives is because the symmetrical blade shape and narrow blade width are specifically designed for quickly killing prey by stabbing the knife into a vital spot. Diver's knives with asymmetrical blade shapes are specialized for cutting and are not suitable for spearfishing. ■ Knife Details Alan Folts, a custom knife maker from the United States and the head of Alan Folts Knives, was invited by CRKT (Columbia River Knife & Tool) to design the S.P.E.W (Small. Pocket. Everyday. Wharncliffe), which was announced in 2008. It is a unique knife unlike any other in the world. When developing new products and exclusively manufacturing and selling them, one of the "intellectual property rights" that protects the features of the product as property is the "design right." However, even if CRKT at the time had applied for design registration for the S.P.E.W and obtained design rights recognized by the United States Patent and Trademark Office, there is no renewal system for the duration of the design right. It is released to the market after 14 years from the registration date, and can be used by competing companies. ■ Blade Shape: Wharncliffe Blade The blade, named after Lord Wharncliffe of the UK, is characterized by a shape where all the force is concentrated at the tip. The thin, sharp tip is similar to the knives used by Japanese chefs for preparing fish, and excels at detailed work such as partial cutting. The "Tsumoto-style Certified Assassin Knife Jr," which has gained attention as a knife specialized for killing fish, clearly follows this blade shape. This knife also minimizes the wounds left on the prey's body surface, and can kill it with a single blow by stabbing it into a vital spot, except for prey with large heads. ■ Additional information will be posted in the comments section.