YOU SAID:

\usepackage[utf8x]{inputenc}; \usepackage{textgreek}

INTO JAPANESE

\usepackage[utf8x]{inputenc};\usepackage{textgreek}

BACK INTO ENGLISH

\usepackage[utf8x]{inputenc};\usepackage{textgreek}

INTO JAPANESE

\usepackage[utf8x]{inputenc};\usepackage{textgreek}

BACK INTO ENGLISH

\usepackage [utf8x] {inputenc}; {textgreek} \usepackage

INTO JAPANESE

\ usepackage [utf8x] {inputenc}; {textgreek} \ usepackage

BACK INTO ENGLISH

\ usepackage [utf 8 x] {inputenc}; {textgreek} \ usepackage

INTO JAPANESE

\ usepackage [utf 8 x] {inputenc}; {textgreek} \ usepackage

BACK INTO ENGLISH

\ usepackage [utf 8 x] {inputenc}; {textgreek} \ usepackage