The following are the events in professional sumo during 2007.
Tournaments
Hatsu basho, Ryogoku Kokugikan, Tokyo, 7–21 January
Haru basho, Osaka Prefectural Gymnasium, Osaka, 11–25 March
Natsu basho, Ryogoku Kokugikan, Tokyo, 13–27 May
Nagoya basho, Aichi Prefectural Gymnasium, Nagoya, 8–22 July
Aki basho, Ryogoku Kokugikan, Tokyo, 9–23 September
Kyushu basho, Fukuoka International Centre, Kyushu, 11–25 November
News
January
21: At the Hatsu basho in Tokyo, Yokozuna Asashoryu wins his fourth straight top makuuchi division championship or yusho, and 20th overall, with a 14–1 record. His only defeat is to veteran former ozeki Dejima on Day 3. Maegashira Toyonoshima finishes as runner-up with a 12–3 score and wins two special prizes, for Fighting Spirit and Technique. In the second highest juryo division, newcomer Toyohibiki wins the yusho after a three-way playoff with Tochiozan and Shimotori, who both earn promotion to the top division for the following tournament.
February
1: Isegahama stable, with a history dating back to 1859, shuts down.
March
25: Ozeki Hakuho comes into the final day of the Haru basho in Osaka level with fellow Mongolian Asashoryu. He defeats fellow ozeki Kotooshu while Asashoryu sidesteps Chiyotaikai. Both men finish on 13–2 and in the subsequent playoff Hakuho sidesteps Asashoryu to win his second championship. Tochiozan is rewarded for his fine 11–4 score in his top division debut with the Fighting Spirit Award, while Homasho also wins eleven and receives his second Technique Prize. Ozeki Tochiazuma withdraws from the tournament after suffering headaches and dizziness. Satoyama wins the juryo championship.
April
30: Toyonoshima, newly promoted to komusubi, is injured whilst training with Asashoryu at Tokitsukaze stable, damaging his ankle and knee ligaments. He is taken to hospital. Toyonoshima's stablemaster criticises the yokozuna.
May
7: Tochiazuma announces his retirement from sumo, as he has been diagnosed with a cerebral infarction and been told it would be dangerous to continue as an active wrestler. He will work as a coach at his father's Tamanoi stable and is in line to succeed him in 2009. 7 :The Sumo Association suspend maegashira Kyokutenho for one tournament after he caused an accident whilst driving in April (wrestlers are forbidden from driving). He will drop to the juryo division as a result. 27: Hakuho wins his second successive championship at the Natsu basho in Tokyo with a perfect 15–0 record (zensho-yusho). Asashoryu manages only a 10–5 score. Three wrestlers finish as runner-up on 12–3: sekiwake Kotomitsuki, Asashoryu's stablemate Asasekiryu, and fellow maegashira Dejima. Asasekiryu wins the Technique Award while Dejima is awarded the Fighting Spirit Prize. The Outstanding Performance Prize is handed out for the first time this year, to maegashira Aminishiki for his defeat of Asashoryu. Estonian Baruto, who has fallen to the juryo division through injury, wins the championship and immediate promotion back to the top division. Former juryo wrestler Wakakirin wins the makushita division championship with an unbeaten 7–0 score. Oga and former juryo (a cousin of Izutsu Oyakata) announce their retirements. 30: Hakuho's promotion to yokozuna is officially confirmed. He becomes the 69th grand champion in sumo history, and is the third youngest after Kitanoumi and Taiho to hold the rank.
June
1: Hakuho performs the yokozuna dohyo-iri or ring-entering ceremony at the Meiji Shrine. 7–11: A tour and exhibition tournament are held in Hawaii, with 38 sekitori ranked wrestlers participating. It is the first time the Sumo Association has visited Hawaii in fourteen years. 26: Tokitaizan, an apprentice at the Tokitsukaze stable, dies after a practice session.