outlawing Christianity and killing all Western missionaries (though that last one doesn’t sound too bad)

Most of work here was done later by Tokugawas: Ieyasu, Hidetada and Iemitsu, but despite brutality it was a W (most of said brutality happened really during Iemitsu reign). Hideyoshi observed in real time how christianity served as softener for colonialism and it's clear he wanted to avoid it, though preferably keeping trade with Europeans. Interesting fact is that christianity was pretty thin in Japan as in case of both Sekigahara campaign and later sieges of Osaka, overwhelming most of Japanese christians supported Hideyoshi's heir Hideyori.