From Japanese-English FreeDict Dictionary ver. 0.1: [ichi1] [news1] [nf01] 四 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 4, 肆 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [ichi1] し /ɕˈi/, (四) [ichi1] [news1] [nf01] よん /jˈo̞ɴ/, (四) よ /jˈo̞/ (numeric) (肆 is used in legal documents) four
[ichi1] [news1] [nf01] 四 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, 4, 肆 /(en)tʃˈaɪniːz(ja)lˈe̞tə/, [ichi1] し /ɕˈi/, (四) [ichi1] [news1] [nf01] よん /jˈo̞ɴ/, (四) よ /jˈo̞/ (numeric) (肆 is used in legal documents) four