In this talk, I'm going to report designs of experiments conducted in Japan this May. These experiments are conducted with an attempt to figure out ``Politeness", which was suggested by Brown and Levinson(1987), in spoken Japanese, apart from ``formality", which is expressed with honorific expressions. In a production test, more speakers of different social status but in a same social group were recruited. They successfully showed their formality using honorifics properly, according to their addressees. A perception test consists of two parts. The first part is a magnitude estimation of relatively neutral utterances in honorifics, with access to lexical information only, and subjects were asked to judge ``formality" of utterances with slight cues of honorific illocutions. The second part is force-choice experiment and the subjects are asked to listen utterances and judge if each utterance's addressee is a speaker's superior/inferior. The contrast of these two parts will show that lexical formality is still a way to show ``negative" politeness (in a sense that showing respect of speakers, not to offend addressees), however, a strategy to convey "positive politeness", acoustics is likely to take more important role.