Advice for touring Japan by train Take an extra layer to keep warm on the train. The air conditioning makes the cabins much cooler than the outside temperature. Take snacks on board can be a little limited, I'd suggest buying some in the station beforehand.

The temperature on the Shinkansen (Japan's bullet train) is generally maintained at a very comfortable and consistent level, typically around 22°C to 24°C (71°F to 75°F). However, whether it feels "cold" is subjective and often depends on the season and where you are sitting. During the humid Japanese summer, the air conditioning is highly effective and can feel quite brisk if you are dressed in light clothing or sitting directly under a vent. Conversely, in the winter, the trains are well-heated, sometimes to the point where passengers in heavy coats may feel a bit too warm. The Green Cars (first class) often have more refined climate control than standard cars. A unique feature of the Shinkansen is the powerful "air curtains" at the doors that prevent outside air from rushing in at stations, maintaining a stable internal environment. If you are sensitive to cold, it is always a smart idea to carry a light layer or a pashmina, as the steady airflow required for a pressurized high-speed cabin can create a slight draft during long journeys across the country.