In sumo wrestling, a kanreki dohyō-iri (Japanese: 還暦土俵入り) is a ring-entering ceremony (dohyō-iri) performed by a former yokozuna in celebration of his 60th birthday (called kanreki in Japanese). If he is a toshiyori (a sumo elder), the ceremony is usually held at the Ryōgoku Kokugikan, the main sumo hall in Tokyo. Those who are not current members of the Japan Sumo Association must hold it at another location. A special red tsuna is created and worn, instead of the usual white tsuna. Reaching your 60th birthday is an important occasion in Japan and is celebrated by wearing a red item. This is commonly known as an akatsuna (赤綱) but this term is unofficial. If the dew-sweeper or sword-bearer is a former yokozuna, he wears his own tsuna.