Chinese Stainless Steel Diver's Knife SILVER Spearfishing Freediving

This is a silver, stainless steel diver's knife from an unknown Chinese brand.
It measures approximately 21cm in total length, with a blade length of about 9.8cm, a blade width of approximately 2.5cm, and a thickness of 3mm. The material is 440C, which is resistant to rust and comparable to SUS.
The case features a locking mechanism that allows for one-touch removal and a secure click when the knife is reinserted.
The case and two straps are included.
The straps appear to be made of a rubber-like material and may not be very durable.
As this is a Chinese product, it's advisable not to expect high quality.

*Please Note*
Knives such as SALVIMAR's PREDATHOR or OMER's LASER, with blade lengths of 5.5cm or more and a double-edged, symmetrical blade shape (sharply pointed tip), may violate the Firearms and Swords Control Law in Japan.
There are individuals who sell such knives with irresponsible explanations, claiming they are legal because one side has a serrated edge, or because they are sold by well-known stores. However, these are likely to be illegal.
Given that freediving and spearfishing can easily lead to suspicion of poaching and reports, it is best to avoid carrying such knives.
Do not underestimate the seriousness of carrying such knives.
Possession of illegal knives is equivalent to illegal possession of actual firearms.
Violating the Firearms and Swords Control Law is a serious offense, and law-abiding citizens should absolutely avoid it.
Especially when buying or selling online, as records remain, it is extremely dangerous.
If even one purchaser uses it for criminal activity and it is discovered, an investigation may follow, and simply having it stored at home could lead to charges.

If you have already purchased or are considering purchasing such a knife, it is recommended to consult with the local police station's Public Safety Division.
This product is a knife with an asymmetrical blade that does not violate the Firearms and Swords Control Law. However, carrying a blade longer than 6cm without a justifiable reason is prohibited by the Minor Offenses Law.
It is permissible to carry it for activities such as diving or camping, and during transit to and from these activities, provided there is a justifiable reason. However, it must be stored appropriately.