YOU SAID:

i want to visit many countries in the next ten years

INTO JAPANESE

今後10年間に多くの国を訪れたい

BACK INTO ENGLISH

I would like to visit many countries in the next 10 years

INTO JAPANESE

今後10年以内に多くの国を訪問したい

BACK INTO ENGLISH

I would like to visit many countries in the next 10 years