The Way of combat strategy can be likened to the craft of carpentry. Comparing samurai with carpenters is related to the subject of “houses.” We speak of noble houses, warrior houses and the “Four Houses.”  We also talk of the collapse or continuation of a house. In the arts we refer to a school or tradition as a house. It is because the label “house” is employed as such that I draw parallels with the carpenter’s Way. The word “carpenter” (dai-ku) is written with the two ideograms meaning “great” and “craft.” The Way of combat strategy is also a “great craft,” which is why I relate it to the carpenter’s endowments. Study the content of these scrolls carefully if you seek to become accomplished in the craft of war. Train assiduously, with the teacher serving as the needle and the student as the thread.

Miyamoto Musashi, Book of Five Rings