YOU SAID:
Japan is a long, narrow island off the coast of china.
INTO JAPANESE
日本は、中国の海岸の沖の細長い島です。
BACK INTO ENGLISH
Japan is a long and narrow island off the coast of China.
INTO JAPANESE
日本は中国の沿岸の細長い島です。
BACK INTO ENGLISH
Japan is an island of the coast of China.
INTO JAPANESE
日本は、中国の海岸の島です。
BACK INTO ENGLISH
Japan is an island of the coast of China.
That didn't even make that much sense in English.