NIPPON Kichi - 日本吉


紅葉 Kouyou Autumnal Leaves

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When autumn arrives, the leaves of deciduous trees turn color, but because of the strong impression of leaves turning red, the autumnal color-changing of leaves is generally called 'kouyou (red/reddening leaves)'. Accurately defined, leaves that turn yellow are called 'ouyou (yellow/yellowing leaves)', while leaves that turn brown are called 'katsuyou (brown/browning leaves)' and so on, respectively.

No matter the color, the substance that is said to have a large part in causing leaves to turn color is a pigment called anthocyanin.

The color-changing of leaves begins when weather with a minimum temperature of 8 degrees Celsius continues for several days. When the minimum temperature dips below 5 degrees Celsius, the color-changing process becomes faster. The best conditions for beautiful color-changing are, long sunshine duration, strong UV rays, appropriate humidity, and a large difference between day temperature and night temperature.

Almost all of the famous 'kouyou' locations are in environments where these requirements are adequately fulfilled. Along with 'hanami (cherry-blossom viewing)' in spring, the 'kouyougari (red-leaf watching)' of autumn is also a nationwide event.

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Autumnal Leaves

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