YOU SAID:

I didn't realize that I was asleep for 100 years

INTO JAPANESE

私は100年間眠っていたことに気づかなかった

BACK INTO ENGLISH

I did not notice that I was asleep for 100 years

INTO JAPANESE

私は100年間眠っていたことに気づかなかった

BACK INTO ENGLISH

I did not notice that I was asleep for 100 years