Flashing steel is a great place to start for anyone studying or thinking about studying Japanese sword technique. I struggled to find Korean Sword form material, and since Japanese and Korean swordmanship have influenced each other so dramatically, found this a very useful reference piece. Flashing steel not only provides useful photos and form/kata references, it introduces the metaphysical as well. There will alwys be the debate between Korean and Japanese sword styles, and who influenced who. Setting aside the politics and accepting the influence each had on the other, Flashing Steel provides any swordsman a useful insight to their art.