The Japanese were likewise banned from entering Dejima, except interpreters, cooks, carpenters, clerks and 'Women of Pleasure' from the Maruyama teahouses. These yūjo were handpicked from 1642 by the Japanese, often against their will. From the 18th century, there were some exceptions to this rule, especially following the policy of promoting European practical sciences implemented by Tokugawa Yoshimune.