Japanese is one of the nationalities who is in the exemption list and can travel to Vietnam without visa if their duration of stay is less than 15 days. However, if they wish to stay longer and come to the country with different purpose from tourism, they must apply Vietnam visa in advance.
Japan is one of many countries in the Vietnam visa exemption list. However, exemption duration for those citizens is only 15 days while in fact there are many people want to stay in Vietnam longer than 15 days. For those cases, applying for a visa is a necessary thing. So is Vietnam visa for Japan citizens the same as citizens of other countries and what are notices related to Vietnam visa for this citizen?
As a citizen of Belgium and other countries which are not included in the Vietnam visa exemption list, you are required to get a valid Vietnam visa for your travel to Vietnam. Citizens of Belgium and those living in this country have two options to apply for Vietnam visa.
Austria is not the nationality which is in the exemption list of Vietnamese Immigration Department. So in any case, you need to apply Vietnam visa before travelling