And let me explain why I ask this. In the last few years I have been travelling too many times to Japan as a tourist (visa free) due to my girlfriend living there.
Although I don't exceed the unofficial limit of 180 days within a rolling year (Japanese immigration official told me about this limit), so many visits to Japan started to get suspicious and I get asked too often.
This leads me to the two following questions:
When you get a new passport with a new number, how do immigration authorities track your previous trips to some particular country? Is it just about your full name? Perhaps some biometric information? Some other persistent ID? I guess it cannot be about full name, as there are many citizes with similar full names.
Would a passport renewal (i.e., new blank passport) help in my case? At least immigration officials wouldn't notice all the Japan stamps I already have. Or perhaps they don't care about the stamps and they get all the data they care about from their computers?