Hiro’s reference is the Bushidō Bushidō (武士道, "the way of the warrior") is a moral code concerning samurai attitudes, behavior and lifestyle. There are multiple bushido types which evolved significantly through history. Contemporary forms of bushido are still used in the social and economic organization of Japan. Bushido is also used as an overarching term for all the codes, practices, philosophies and principles of samurai culture. It is loosely analogous to the European concept of chivalry. There are notable similarities and differences depending on which bushido type is compared with chivalry. Christianity had a modifying influence on the virtues of chivalry, whereas bushido was influenced by Zen Buddhism, Shinto, and Confucianism. For centuries the samurai adhered to multiple types of the code of which the interpretations varied per samurai clan. This encompassed morality, their role in society, how to live a life with honor and virtue. The samurai had some common values, but they did not have a singular definition or path that all samurai were required to abide by. The samurai were as practical on the battlefield as any other warriors. These concepts, codes and ideals were ingrained in the samurai since they rose to power in the Kamakura period (1185–1333). At certain eras there were prevalent rules and unwritten customs such as the "Way of the Bow and the Horse" (弓馬の道, kyūba no michi) since the 12th century and in the Edo period the code of the samurai was formalized with specific virtues and laws by the ruling Tokugawa Shogunate. Bushido has continued to exist in various types. Additional concepts and ideas were added to bushido so that it could evolve with the times. It was used in the Armed Forces of the Empire of Japan and symbolically by the successor Japan Self-Defense Forces. In the Taisho period, bushido was advocated as the way of the merchant. It can be dormant for years and revived during geopolitical instability. Centuries of rule by the samurai class has left a deep impact on Japanese society. Thus various forms are still used today in e.g. Japanese culture, business, martial arts and communication.