The "Dokkōdō", is a short work written by Miyamoto Musashi (宮本 武蔵 ) a week before he died in 1645, "Dokkodo" was largely composed on the occasion of Musashi giving away his possessions in preparation for death, and was dedicated to his favorite disciple, Terao Magonojō (to whom the earlier "Go rin no sho" ["The Book of Five Rings"] had also been dedicated), The Book of Five Rings (五輪書 , "Go Rin no Sho" ) is a text on kenjutsu and the martial arts in general, written by the swordsman Miyamoto Musashi circa which year?