Direct answer: the Japanese spouse visa (configuration-of-Japanese-national status) grants 1-to-5-year renewable residence with UNRESTRICTED

Direct answer: marriage (or stable union) with a Brazilian cuts naturalisation to ONE year of residence — the hemisphere's fastest marriage

Direct answer: marriage to a Mexican citizen cuts naturalisation to TWO years' residence (the vecindad — down from five), with the Spanish i

Direct answer: three years of marriage (or de-facto union) to a Portuguese citizen opens citizenship by DECLARATION — with NO residence-in-P