Kōki is a Japanese term that can refer to various concepts, including a specific period in history or a type of traditional Japanese art. In the context of time, Kōki often denotes the era following the Heian period, which is known for its cultural and artistic achievements. Additionally, Kōki can also refer to a style of Japanese calligraphy that emphasizes fluidity and grace. This art form is characterized by its expressive brush strokes and is often used in creating decorative pieces or formal documents.