how can anyone fight like that without any kind of real weapon like a sword?

Basically are shurikan though just in odd shapes. He could also put between fingers and slash when throwing punches.

It depends on the material. The Hanafuda cards are probably made from something akin to carbon fiber or a steel alloy and sharpened. A material similar to carbon fiber was made in Dr Stone if you'd like to see how it could be made with their level of technology.

The best part was when they did all that fighting!

Man they all are killing machines 😈

He's such a fuckin prick. lol
Also, the guy from the red light district is shifty and reminds me of a kitsune. I don't like him.

Felt like Ghost of Tsushima