The purpose of this study is to describe the ongoing change in use of dialectal honorifics in Okazaki, Aichi prefecture. Results from the Okazaki Survey on Honorifics, conducted three times between 1953 and 2008, were analyzed in our examination. In the analysis, we first divided the observed forms into four categories: standard forms, traditional dialectal forms, new dialectal forms (including mieru and chodai), and intermediate forms. We then examined their overall usage, including context-specific use of these forms as well as the context-specific use of dialectal honorifics. The results of the analysis include the following. First, the exclusive use of a standard form in all contexts has greatly increased, while the use of traditional dialectal forms has fallen sharply. The use of intermediate forms, which tended to occur in non-dialectal contexts, increased slightly in the second survey but had fallen drastically in the third survey. The context-specific analysis revealed that either the standard or dialectal forms were selected in accordance with the situation. Secondly, dialectal honorifics have almost entirely disappeared by the third survey, with the exception of the traditional form (ra)reru and new form mieru. The (ra)reru forms, which previously indicated a lower level of politeness, have now advanced to the higher level, and, along with the mieru forms, are now being used frequently, thus transforming into the standard use. Finally, the existence of the intermediate forms suggests that some dialect speakers find difficulty in mastering polite expressions, and that their ability to apply the standard honorifics is heterogeneous.