If you intend to visit Japan for tourism/visit purposes you will likely need a Japan visit Visa.
Japan is one of the most-visited countries in the world, receiving millions of tourists every year, who travel to see its mix of modernism, culture, history, and nature.
Out of those tourists, many had to apply for a Tourist/visit Visa before they could travel there, although not everyone needs a Tourist/visit Visa for Japan.
You need a Japan Visit Visa if you want to enter Japan for tourism purposes, for a visit to family or friends, or other recreational and short-term purposes that do not require you to engage in paid activities.
Citizens of most countries in the world must apply for a Japan Visa. This means that if the citizens of those countries (which includes EU countries, the USA, Australia, the UK, etc.), do not have to apply for a visa for Japan if they are traveling for tourism, visits, or other recreational and short-term purposes.
A Japan Tourist Visa is issued for a maximum duration of 90 days, usually for a single entry. You can spend up to 15 days in the country once you enter via the Tourist Visa.