What group concerned the Tokugawa shoguns enough to limit the contacts between Japan and Europe?

"Christian missionaries" group concerned the Tokugawa shoguns enough to limit the contacts between Japan and Europe.

Explanation:

Tokugawa Ieyasu, who led the nation after Hideyoshi's death, initially tolerated Christian faith, but eventually abolished Christianity throughout the country, to reinforce the base for the family-led Tokugawa regime.

Finally, in 1614, he decided to ban Catholicism and, in the mid-17th century, requested that all Foreign missionaries be expelled and that all converts be executed. That signaled the end of accessible, Japanese Christianity. Tokugawa ruled nation for half a century and pressurized Christian Japanese to direct towards Buddhism.

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