✔ 最佳答案
I assume that you have a HKSAR Passport and BNO.
It does NOT matter where you were born. Among all the countries in the World, only TAIWAN concerns about where HK passport holders were born.
France and Greece is part of EU Schengen Agreement, so the immigration policies are identical in both countries. With your HKSAR passport and BNO (recently), you can enter EU+(Norway+Switzerland+Iceland+Leichtenstein) for 3 months without visa
For Japan, again both passports entitled you to enter the country for sightseeing and business trips without visa for three months.
What your friend told you is long outdated news already, HK joined the Japanese visa free list since 01/04/04.