YOU SAID:

My moms sisters best friends nieces uncles grandsons father is my best friend

INTO JAPANESE

私のお母さん姉妹の親友姪叔父孫の父は私の親友

BACK INTO ENGLISH

My mother's sister's best friend My niece my uncle's grandfather's father is my best friend

INTO JAPANESE

私の母の妹の親友私の姪私の叔父の祖父の父は私の親友

BACK INTO ENGLISH

My mother's sister's best friend My niece My uncle's grandfather's father is my best friend

INTO JAPANESE

私の母の姉の親友私の姪私の叔父の祖父の父は私の親友

BACK INTO ENGLISH

My mother's sister's best friend My niece My uncle's grandfather's father is my best friend