In 2026, the cheapest city to fly into Japan is often Osaka (KIX - Kansai International Airport). This is primarily because Osaka serves as a massive hub for "Low-Cost Carriers" (LCCs) like Peach Aviation, Jetstar, and various budget airlines from South Korea and China. Because competition is so high at KIX, international fares from North America and Europe can often be $100–$200 cheaper than flights into Tokyo's Narita or Haneda. Another emerging "value" entry point is Fukuoka (FUK), especially for travelers coming from elsewhere in Asia, as it is just a short hop from Seoul and Taipei. While Tokyo remains the most popular destination, its airports carry higher landing fees and higher demand, keeping prices elevated. For a budget-conscious traveler, flying into Osaka is a smart move; not only are the flights cheaper, but you are also perfectly positioned to explore the relatively more affordable Kansai region, including Kyoto and Nara, before taking the Shinkansen up to Tokyo.