Kaku-obi is a traditional Japanese belt used to wear kimono and other traditional Japanese clothing. It is a thick, wide and strong belt that usually ties in a knot at the back. A kaku-obi is usually about 4 metres long and about 10 cm wide.
This type of belt is used for various types of traditional Japanese clothing such as kimonos, yukata, happi coats and other types of clothing. Kaku-obi is made from a variety of materials including cotton, silk and synthetic fibres.
Kaku-obi is traditionally tied in an intricate knot on the back called an "otaiko", which can be very ornate and intricate. This method of tying the belt is mainly used for traditional women's kimonos. For men's kimonos, a simpler method of tying is used, called 'kai no kuchi'.