This study employed 10 native Japanese speakers and 40 advanced Japanese learners with different dialectal backgrounds as subjects. We explored the perceptual tendency of Japanese singleton and geminate contrasts by conducting 2-step speech perception experiments. The results showed that the perception of singleton/ geminate contrasts was greatly affected by mora types，and all subject groups showed high level of categorical perception by adopting CD/ EWD as variable. At the same time， differences in mother tongue (dialect) led to significantly different perceptual tendencies of Japanese singleton / geminate contrasts. Language transfers due to mother tongue (dialect) could be seen as well on the perceptual level, thus clarifying the influence of this factor as a non-timing cue. This study also clarified that speech perception takes precedence over speech production by contrasting performances between speech perception and production. It provides an experimental linguistic reference for further interpreting the relationship between these two processes in speech acquisition.