Japan isolated itself for more than 300 years from the mid 1500s to the mid 1800s. what was the effect of this isolation

Japan was isolated during the period of Tokugawa Shogunate ( from the mid 1500s to the mid 1800s ). The reasons why the Shoguns wanted to isolate country from the rest of the world are: foreign influences and the spread of Christianity.
The effects of the isolation:
- The influence of the foreigners was under the control.
- Christianity was forbidden.
- The growth of large centers into cities. The cities were easier to defend, but they relied on the rural communities.
- The wealth of country was increasing.
- China and Korea were allowed limited access.
- The Duch were allowed to trade in certain ports.