Kouko Fukazawa Nonohana Flower Museum, Biographical art museum in Nagakura, Karuizawa, Japan.

The Kouko Fukazawa Nonohana Flower Museum occupies the second floor of the former Karuizawa Post Office, a two-storey wooden Western-style building erected in 1911 and moved to the shore of Lake Shiozawa. It displays paintings, prints, book illustrations and bindings by Kouko Fukazawa, and a reconstruction of her atelier.

The building itself dates to 1911 and originally served as a post office before becoming a registered cultural property of Japan. The museum was established in 1996 and has since used this protected historic structure to display its collection.

The museum is named after Kouko Fukazawa (1903–1993), a Western-style painter from Morioka who spent more than twenty summers from 1964 at the Horiguchi Tatsuo villa in old Karuizawa with her husband, the painter Shozo Fukazawa, sketching wild grasses and flowers. Besides paintings and prints, it keeps books she illustrated and bound and her personal collection, and reconstructs her atelier.

The museum is located within the Karuizawa Taliesin complex and is accessible by public transportation. Plan to spend a few hours here if you want to explore the exhibitions thoroughly and consider joining any workshops or guided sessions offered during your visit.

The building, completed in 1911, first stood in old Karuizawa as the post office; from 1971 to 1995 it served as the Karuizawa tourist hall before being moved to the shore of Lake Shiozawa. The whole structure is registered as a national tangible cultural property under the name "Meiji 44 Building (Former Karuizawa Post Office)".