How did japanese social structure change during the tokugawa period?

Virtually no big war in one stable government for over 250 years. 

As commerce flourished and the merchant class gradually gained economic power during these peaceful years, a new urban culture developed and it became very sophisticated. 
The literacy rate in Edo was estimated about 70-80%, whereas Paris was about 10%, London was about 20%, in 18th. Century. Infrastructures, like Sewerage system, were well organized and the streets were kept clean. 
The capital of commerce, Edo, had became the biggest city in the word. 

On the other hand, citizens became very obedience to the government and democracy had not be developed.

Several different things make up a culture like, how the people worship, their form of government, geography, and trade. religion is one of the most important things to a culture, it defines peoples life. their different beliefs form into festivities and events that merge with their culture. people that practice hinduism see cows as gods, so no doubt they would celebrate cows, and these celebrations would definitely merge with their culture. those that are buddhist live life trying to reach a certain level of peace, so no doubt would they change things in their life in order to correspond with their religion.

Answership building; new england was almost entirely mercantilist