6. analyze causes what caused japan to
institute a policy of isolation? defend your
viewpoint with evidence from the text.

Explanation:

The Tokugawa shared Hideyoshi's suspicions that Christian missionary work could be a pretext for a future invasion of Japan by one of the European powers. In 1635, shogun Tokugawa Iemitsu decided that the only way to ensure Japan's stability and independence was to cut off almost all contact with other nations.

answer; i believe the correct answer is (the willamete valley);