how is this associated with the tokugawa era?
During the Edo period Noh continued to be aristocratic art form
Noh
During the Edo period Noh continued to be aristocratic art form 
the most important figure in the history of japanese nō theatre is UNANSWERABLE who is noh? It is a major form of classical Japanese dance-drama that has been performed since the 14th century. how did it originate? shirabyōshi "(traditional dances performed by female dancers in the Imperial Court in the 12th century), "gagaku" (music and dance performed in the Imperial Court beginning in the 7th century), and "kagura" (ancient "Shinto" dances in folk tales) evolved into Noh and "kyōgen". what can you tell me about their attire? Noh actors wear silk costumes called "shozoku" (robes) along with wigs, hats, and props such as the fan. The musicians and chorus typically wear formal "montsuki" "kimono" (black and adorned with five family crests) accompanied by either "hakama" (a skirt-like garment) or "kami-shimo", a combination of "hakama" and a waist-coat with exaggerated shoulders. do they use masks? Only the "shite", the main actor, wears a mask in most plays, even though the "tsure" may also wear a mask in some plays to represent female characters. what all elements do they take include while performing? The use of props in Noh is minimalistic and stylized. The most commonly used prop in Noh is the fan, as it is carried by all performers regardless of role. Chorus singers and musicians may carry their fan in hand when entering the stage
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Noh [SEP] Tokugawa era
During the Edo period Noh continued to be aristocratic art form supported by the "shōgun", the feudal lords ("daimyōs"), as well as wealthy and sophisticated commoners. While "kabuki" and "joruri" popular to the middle class focused on new and experimental entertainment, Noh strived to preserve its established high standards and historic authenticity and remained mostly unchanged throughout the era. To capture the essence of performances given by great masters, every detail in movements and positions was reproduced by others, generally resulting in an increasingly slow, ceremonial tempo over time.