Japan in October is characterized by "transitional" weather, requiring a layered wardrobe to stay comfortable. In 2026, as climate patterns remain mild, daytime temperatures in Tokyo, Kyoto, and Osaka usually range from 18°C to 23°C (64°F–73°F), while evenings can drop to a crisp 13°C. Your base should include breathable cotton t-shirts or long-sleeved blouses, paired with comfortable chinos or jeans. A lightweight jacket, trench coat, or denim jacket is essential for the mornings and late nights. Since you will likely be walking 10,000 to 20,000 steps a day, high-quality, broken-in sneakers are a must. Additionally, October marks the end of the typhoon season, so carrying a compact travel umbrella or a stylish waterproof shell is highly recommended. If you plan to visit the mountainous regions like Hakone or the northern island of Hokkaido, you should pack slightly heavier layers, such as a fleece or a light down vest, as those areas can feel significantly colder than the central metropolitan hubs during the autumn months.