Verified answer

"Japanese companies don't like to see blank (open) spots in a person's work history"

- meaning, they want a complete work history with nothing left out. A blank time period becomes a questionable issue (did you just do nothing, was it something negative that was omitted, etc)

- may also mean (similiar to what you said) "Japanese companies don't like to see a blank work history", or, "...a person without any work history"

Japanese companies, that there is a blank to hate that

person's career