Kas-pin is a Finnish martial art that has both weapon and empty-hand techniques.

The history of Kas-pin is not very well known, and what little is known is generally disputed.

Kas-pin has been passed down in the Valkonen family allegedly for 30 generations. Current generation family head is Kaarlo Valkonen, who lives in Hankasalmi and travels to teach his art in seminar format across the country.

Kas-pin's techniques include many weapon techniques which are the basis of the art. Empty-handed techniques come as a secondary way to defend one's self. Kas-pin also incorporates an art of fighting in the dark called Riihioppi. Kas-pin also teaches fighting in different environments such as swamps and marshlands, rocks, dense forest etc.

Kas-pin's empty-handed techniques follow four principles: nerve strikes, Hipaisu (gentle touch), Enkelin kosketus (the touch of an Angel) and Näkymätön käsi (the invisible hand). The latter two cannot be tought by a person to another and are said to come to a student's understanding when one is ready for them.

Weapons used in Kas-pin are many and varied:

• Knife (Finnish puukko)
• Bear-spear
• Sickle
• Karttu (a club with an approximate length of a baseball bat)
• Sword
• Sotilasvanhus (a doubly curved walking stick, literally old military man)
• Remmi aka Remeli (a belt with a weight at the end)