Samurai Katana Key Ring (Gold) Feel the Soul of Samurai. The katana sword can be take out of the cover. Get a real-made miniature katana. Katana is particular Japanese weapon which has a long history and story. Samurai couldn't fight without his own katana. We can say that katana is the soul of a samurai. Entire product size is 12 cm and katana is 11.5 cm