Depois de pesquisar um pouco, parece que sim , alguns países realmente se importam em ver um PDI de 1949.
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Japão . A Europcar declara o seguinte sobre os seus alugueres japoneses:
International Driving permit based on "Geneva Convention of Road Traffic 1949" should be presented at the time of pick up. It is the only International driving permit acceptable in order to drive in Japan. No other exception is allowed, especially note the following international permit or license is INVALID and UNACCEPTABLE in Japan.
International Driving Permit based on Vienna Convention 1968