Your Japanese vaccine passport will be not acceptable in Bulgaria. The Bulgarian Ministry of Health is updating regularly a list with conditions that the foreigners from each particular country need to present in order to enter Bulgaria. Please check the current list on the site of the Ministry as it is updated frequently.
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How can investors with Japanese vaccine passports enter Bulgaria?
I'm an investor based in Japan looking to explore business opportunities in Europe. Recently, Japan began issuing its own vaccine passports which is different from EU's own COVID digital certificate. What do I need to do if I want to enter Bulgaria and stay? Would my Japanese vaccine passport be acceptable to Bulgarian authorities?