Why did the tokugawa shogunate close Japan to foreign influences?

As Europeans were exploring Asian countries with the goal of creating trade agreements, many areas were experiencing a push of western culture. To prevent the influence of western culture, the Tokugawa Shogunate refused westerners and made western culture unlawful. The samurai also resented western influence because it promoted the status of merchants and degraded their own position in society.

health and medicine because people are dying from not being healthy or not strong enough medicine