Jisho

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Noun, Suru verb, Intransitive verb
1. leaves turning red (in autumn); red leaves; autumn colours; fall colorsSee also 黄葉
Wikipedia definition
2. Autumn leaf colorAutumn leaf color is a phenomenon that affects the normally green leaves of many deciduous trees and shrubs by which they take on, during a few weeks in the autumn season, one or many colors that range from red to yellow. The phenomenon is commonly called fall colors and autumn colors, while the expression fall foliage usually connotes the viewing of a tree or forest whose leaves have undergone the change.
Read “Autumn leaf color” on English Wikipedia
Read “紅葉” on Japanese Wikipedia
Read “Autumn leaf color” on DBpedia

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