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Travel routes were prescribed by the shogun as a defensive measure , so new towns sprung up along the routes leading from the various domains into the city . As a pastime indulged in by the Shogun ( the leader of samurai ) and the daimyo ( feudal lords ) , fireworks were set off at their command as they sat in their private boats enjoying the summer breeze . The program reflects on the rapid acceleration of industry and technology in the country , industry that was nonexistent fifty years ago and is fueled by the Shogun philosophy . It involved the introduction of separation of powers following the example of Western governments , with the administrative authority to be held by the shogun , the judicial authority ( for the sake of expedience ) by each of the domains , and the legislative authority by an assembly ( giseiin ) composed of the daimyo and samurai from each of the respective domains . Daimyos ( lords ) - Daimyos were landowners and were heavily regulated by the Shogun 's laws .