Wako, Wakō, Wakou, WAKO or W.A.K.O. can refer to:
- Wako (retailer), a Japanese retailer whose best known store is in Ginza, Tokyo
- Wakō, Saitama, a city in Japan
- World Association of Kickboxing Organizations
- WAKO (AM), 910 AM, a radio station near Lawrenceville, Illinois
- WAKO-FM, 103.1 FM, a radio station near Lawrenceville, Illinois
- Amos Wako, the attorney general of Kenya
- Gabriel Zubeir Wako, archbishop of Khartoum, Sudan
- Haruo Wakō, a member of the Japanese Red Army
- Wokou (Japanese pronunciation wakō), pirates who raided coastlines of China and Korea from the 13th to the 17th century
- Wako Pure Chemical Industries, Ltd, a chemical manufacturing company in Japan
is a department store retailer in Japan, whose best known store (commonly known as the Ginza Wako) is at the heart of the Ginza shopping district in Tokyo. This store is famous for its watches, jewellery, chocolate, porcelain, dishware, and handbags, as well as upscale foreign goods. There is an art gallery, called Wako Hall, on the sixth floor. Wako was founded in 1881 by Kintarō Hattori as a watch and jewelry shop called K. Hattori (now Seiko Holdings Corporation) in Ginza. In 1947, the retail division split off as Wako Co., Ltd.
From 1894 to 1921, the Hattori Clock Tower stood on the site that Wako occupies today. In 1921, the Hattori Clock Tower was demolished to rebuild a new one. The reconstruction was delayed due to the Great Kantō earthquake of September 1, 1923. The new tower was completed in 1932 as the K. Hattori Building. In homage to its predecessor, the new store was also fitted with a clock.
Its 1932 Neo-Renaissance style building, designed by Jin Watanabe, with its curved granite façade, is the central landmark for the district and one of the few buildings in the area left standing after World War II. The building functioned as the Tokyo PX store during the Allied Occupation of Japan from 1945 to 1952. The clock tower plays the famous Westminster Chimes.
Wako has branches in Haneda Airport, Shinsaibashi, and some luxury hotels in Japan.
Image:Wako ginza at night.jpg|Ginza Wako at night Image:Wako1000.jpg|The Wako store in Ginza