He made his professional debut in January 1997. He reached the second highest
jūryō division after three years in January 2000. He made the top
makuuchi division just three tournaments later in July 2000. He won his first special prize in his debut top division tournament, for Fighting Spirit. In January 2003, he scored his first win over a
yokozuna by defeating
Takanohana, who announced his retirement the next day. He was a runner-up in the May 2003 tournament. In 2004, he briefly fell to
jūryō after suffering an injury in the July tournament. Aminishiki has won the prestigious
ginō-shō or Technique Prize on six occasions, and has also earned eight
kinboshi or gold stars for defeating
yokozuna. Having come close on a number of occasions, Aminishiki finally made his ''
san'yaku debut in November 2006, having chalked up an impressive 11–4 runner-up record at maegashira 3 rank the previous September. He fell short with 6 wins at komusubi, but remained in the upper maegashira
ranks. In July 2007, he returned to komusubi
and scored 8–7, winning his second successive shukun-shō
, or Outstanding Performance Award. This earned him promotion to sekiwake'' for September 2007. It took him 43 top division tournaments to reach sumo's third highest rank, the fourth slowest rise ever. He won his first eight bouts in his
sekiwake debut, leading the race for the championship, although he faltered in the second week and finished with a 10–5 record. In the November 2007 tournament he won his last three bouts to preserve his
sekiwake rank with an 8–7 score. In January 2008, however, he could win only five matches and fell back to the
maegashira ranks. In March 2008 he defeated
yokozuna Hakuhō having injured his right knee the day before the match in a loss to
Asashōryū. In May 2008 he scored an impressive ten wins and was the only man to defeat
Kotoōshū, the winner of the tournament, which secured him his third Outstanding Performance Prize. Aminishiki returned to the
sekiwake rank in January 2009 after winning his fourth Outstanding Performance Prize at
komusubi in November 2008. However, he was still wearing a brace on his right knee when he faced
yokozuna Asashōryū on Day Eight. Asashōryū shoved him out of the ring, at which point Aminishiki winced, collapsed and grasped his right knee. He forfeited the next day's bout against
Kyokutenhō, and pulled out of the tournament altogether after doctors pronounced he would require at least two weeks to heal. Falling back to the
maegashira ranks for the March tournament, he produced a 9–6 score on his return. He earned his seventh
kinboshi, and fourth from Asashōryū, during the May 2009 tournament. In July 2009 he scored eleven wins and won his fourth Technique Prize, guaranteeing him a return to ''san'yaku
. In September he was ranked at komusubi
but just failed to secure his kachi-koshi, falling to Kakuryū on the final day to finish 7–8. A strong performance in the January 2010 tournament saw him win eleven bouts and pick up his fifth Technique Prize. He returned to the komusubi
ranking in March, and to sekiwake
in May. Dropping to the maegashira
ranks for July, he was forced to withdraw after injuring his right knee yet again in a win over Tochinoshin on Day 12. His withdrawal drew much attention in Japan because it meant on that day foreigners outnumbered native born Japanese in the top division for the first time ever (17 to 16). He remained an upper maegashira
, and held on to the maegashira'' 3 rank in July 2011, despite only scoring 7–8 in the previous tournament, due to the larger number of forced retirements from the top two division in the wake of a match-fixing scandal – his brother amongst them. In March 2012 he returned to the rank of
sekiwake for the first time in ten tournaments, and although he fell just short of
kachi-koshi with a 7–8 record, he remained in the ''san'yaku
ranks at komusubi
in May. On Day 1 he defeated Hakuhō for the fourth time, handing the yokozuna
his first opening day defeat since November 2008 – and Aminishiki was the wrestler who beat him on that occasion as well. Aminishiki also beat ōzeki
Baruto, Kotoōshū and Kakuryū in the opening five days, but was defeated on the final day to fall to a 7–8 record and missed out on his fifth Outstanding Performance Prize. He returned to komusubi
in July 2014 and won his sixth Technique Prize in September, which was his eleventh special prize overall, and first since 2010. Following the retirement of Kyokutenhō in July 2015, Aminishiki had the most appearances in the top division of anyone on the banzuke,'' and he finished his career fourth on the all-time list. He defeated
yokozuna Kakuryū on the third day of the January 2016 tournament, his eighth (and final)
kinboshi and first since 2009. At 37 years and 3 months he was the fifth oldest wrestler to earn a
kinboshi. He defeated every
yokozuna he faced at least once. In May 2016 he competed in his 93rd top division tournament, equal fourth on the all-time list, but he tore his left
Achilles tendon on the second day and had to withdraw. He missed the Nagoya tournament in July, which meant he dropped to the
jūryō division in September for the first time since 2004. He continued to compete despite falling to
jūryō, with 8–7 records in the September and November 2016 tournaments. In May 2017 he had the chance to win his first
yūshō or championship in any division at the age of 38 but he was defeated on the last day by
Nishikigi. In the September 2017 tournament he was one of four wrestlers to finish with a 10–5 record and took part in a playoff for the championship, but was eliminated at the semi-final stage. Nevertheless, he was promoted to the top division for the November 2017 tournament, becoming at 39 years of age the oldest man to return to
makuuchi since the
Japan Sumo Association began keeping records in the 1920s. In this tournament he secured his majority of wins against losses on the final day with a victory over
Chiyoshōma and was awarded the Fighting Spirit prize, his first
sanshō since 2014 and his first Fighting Spirit Award since his debut top division tournament over 17 years previously. He missed three days of the January 2018 tournament with a knee injury, but returned from Day 10. After falling back to
jūryō in March he returned to the top division again in May, extending his own record for the oldest wrestler to be promoted to
makuuchi. ==Retirement from sumo==