How much should I budget for a Japan trip?

It depends on your travel style, season and plans, so this site avoids giving numbers that could be out of date. A more reliable approach is to plan by category: getting there, lodging, local transport, food, activities, shopping, connectivity, insurance and documents, money costs and a flexible reserve. Research current prices from official or booking sources and note the date you checked. Convert at a reference rate for a rough guide, and add a line for the cost of moving money.¹