In an average year, Sendai (Tohoku)'s autumn leaves reach peak color around November 21. For a November 21–30 trip, the chance of overlapping peak color is ~68%, and the chance of seeing at least some autumn color is ~80%.
Across November 21–30 in an average year, expect roughly 4 days of falling / past peak, and 3 days of peak colour. Past peak — colours fading and leaves coming down. Gingko carpets can still be striking.
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