The most efficient way to travel long distances in Japan is the Shinkansen (bullet train) network, which is world-renowned for its speed, punctuality, and comfort. It can take you from Tokyo to Kyoto in just over two hours, often beating the total travel time of a flight when you factor in airport transfers. Within major cities like Tokyo and Osaka, the subway and train network is incredibly dense and efficient; using a rechargeable IC card like Suica or Pasmo (which can be added to your digital wallet) allows you to tap in and out of stations without buying individual tickets. For more remote areas or islands not served by rail, highway buses are a reliable and cost-effective alternative. To make your travel even more seamless, utilize the "Takuhaibin" (luggage forwarding) service to send your suitcases between hotels for a small fee, allowing you to navigate busy train stations hands-free. While taxis are plentiful, they are expensive and often slower than the trains due to city traffic.