This study investigated the effects of High Variability Phonetic Training (HVPT) on beginner level English as a Foreign Language (EFL) Japanese learners' perceptions and productions of the English fricatives /f/, /v/ and /?/. With the use of the computer program 'English Accent Coach' (EAC, Thomson, 2017), two groups of participants were engaged in learning the sounds in a two-syllable environment: target consonant + vowels (CV) and target consonant + vowels + consonant (CVC). The perception training with EAC was conducted for five weeks between a pre-test and a post-test in perception and production. Production was measured in the form of recorded reading aloud and was evaluated by native English speakers and a Japanese teacher of English. The results indicated the advantageous effects of CVC environments on perception as well as on production. [For the complete proceedings, see ED600837.]