This paper studies sentence-final particles ‘ya’ and ‘yo’ suffixed to the typical imperative expressions, such as the continuative form and TE-form among others in young people’s Ehime Matsuyama dialect, from the viewpoint of sentence-final tone and speech function. Throughout this study, four points are clarified: (1) The sentence-final particles ‘ya’ and ‘yo’ both strengthen the binding force of the speech function. (2) Each sentence-final tone represents one of the following functions or speaker’s attitude: (i)“subordinate conjunction tone” with which the speaker encourages the hearer to do the assigned act, (ii)“lower conjunction tone” with which the speaker expresses his belief such that “the hearer should do the assigned act”, (iii)“subordinate conjunct interrogative rising tone” with which the speaker expresses that he/she examines the hearer’s reaction to the speakers preceding utterance, (iv)“lower conjunct interrogative rising tone” with which the speaker examines whether the hearer who has no option obeys the speaker, (v) “emphatic rising tone” that represents the speaker’s on-site instruction to the hearer, and (vi)“falling tone” with which the speaker intends to correct the hearer’s violation of the assigned act. (3) “Lower conjunct interrogative rising tone” has no corresponding tone when the sentence-final particle suffixes to the preceding verb. Therefore, “confirmative instructions” can be expressed only if the sentence-final particle suffixes to the preceding verb. (4) Unlike ‘ya’, ‘yo’ is a sentence-final particle with which the speaker attempts to make the hearer to execute an assigned act by letting him/her alter his/her way of thinking.