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There are six grand sumo tournaments (basho) throughout the year in Japan. Three take place in the capital, Tokyo, with one each in Osaka, Nagoya and Fukuoka. Each tournament lasts for 15 days with the first and final bouts taking place on a Sunday.
The most popular days for watching sumo are on the weekends when tickets may be hard to come by. The bouts in the top division begin in the afternoon and traditionally end around 6pm.
Though not as popular as it once was, sumo is televised live on NHK, the national broadcaster, with a digest of the day's action shown later on in the evening.
Osaka - March at Osaka Prefectural Gymnasium close to Namba Station on the JR, Nankai and Osaka subway lines.
Nagoya - July at Aichi Prefectural Gymnasium, a short walk from Shiyakusho Station (City Hall) on Meijo Line of the Nagoya subway.
Fukuoka - November at Fukuoka Kokusai Center, a bus from JR Hakata Station to the Kokusai-kaigijo Sunpalace-mae bus stop.
A day at a Sumo tournament