We analyze the description of the polite language in the early 17th century Japanese grammars, mainly the ‘large’ grammar
(1604–1608) by the missionaries João Rodrigues ‘Tçuzu’ [the interpreter], S.J. (1562–1633), and the Japanese grammar
(1632) by Diego Collado, O.P. (late 16th century–1638). Over 350 years of the Pragmatics established as a linguistic
domain, one of the first Japanese dictionaries (1603–1604) introduced the designation of honorific particles and honored
verbs. Rodrigues developed this terminology considerably, having analyzed accurately social and linguistic relationships
and ways of Japanese reverence and politeness. He proposed an innovative linguistic terminology, inexistent in former
European grammars and dictionaries, of which a part was followed by Collado: honorific and humble or humiliative
particles, honored and humble verbs, honorable or honorific and low pronouns. Rodrigues also paid special attention
to the women’s specific forms of address, describing their own ‘particles’. To sum up, the earlier 17th century Japanese
grammars described pioneeringly what nowadays has been called as the Politeness Principle of Japanese or the honorific
language of Japanese, termed as Keigo (respect language) or, academically, Taigū Hyōgen (treatment expressions).