Weapon name: Fin Blades
Description: Two thin, light weight swords (approximately 4.5 lbs.) 30” in length and they curve. The width is approximately 32.1 mm. The swords resemble the fins of a shark. They are made of carbon steel which is 3 times lighter than steel. Can also be made of kairoseki which would make it lighter to my understanding
History: These swords were made by a fishman for underwater battle and also for battle on land for easy and quick movements.