Kaishu is a traditional style of Japanese calligraphy that emphasizes fluidity and elegance. It is characterized by its clear, legible characters, making it accessible for both artistic expression and practical writing. This style often uses a brush and ink, allowing for variations in stroke thickness and texture. Originating during the Edo period, Kaishu became popular for its balance between beauty and readability. It is commonly used in various forms of written communication, including letters and official documents, and remains a respected art form in contemporary Japan.