Tatsu Ryōya was born in Kanazawa, Ishikawa and is the youngest of three children. His father was a truck driver. He was a normal-sized baby but grew quickly so that when attending kindergarten he had difficulty fitting into the uniform. He first began practicing sumo whilst in the first grade of elementary school. By the age of thirteen, when he ended his first year at junior high school he stood, and weighed. After competing successfully in junior high school sumo he gave up formal education at the age of fifteen and entered the Takadagawa stable to pursue a professional career.
Career
Early career
In the early part of his sumo career the wrestler subsequently known as Kagayaki competed as "Tatsu", his family name. On entering the professional sport Tatsu revealed that his idol was Hakuhō and that his aim was to become a yokozuna "in six or seven years". He was still a month away from his sixteenth birthday when he made his professional debut in May 2010 but recorded six wins in the jonokuchi division to earn an immediate promotion. Two months later another 6-1 result saw him being promoted from jonidan to sandanme, the fourth-highest division. After five more tournaments he was promoted to makushita after a 5–2 result at the Nagoya tournament in July 2011. On his third tournament in the division, in January 2012, the seventeen-year-old Tatsu tied for the lead with six wins at the end of regular competition but was defeated in the first round of an eight-man play-off for the makushita championship. Tatsu spent the next two years performing consistently in the mid to upper makushita ranks before a run of eight consecutive winning records saw him being promoted to jūryō for the November 2014 tournament. It was at this point that Tatsu announced that he had adopted the shikona Kagayaki, after the express train service which runs between Tokyo and Kanazawa, his home town. Kagayaki made an immediate impact in jūryō, recording 11–4 and 10–5 records in his first two tournaments to reach the brink of another promotion but initially struggled when moved up to the division's higher ranks. A 10–5 record in September however, put him back in contention and an 8–7 in November 2015 saw him promoted to makuuchi for the first time.
Makuuchi career
Kagayaki struggled in his top division debut: he won only two of his first thirteen matches, one of which was a walk-over when his scheduled opponent, Endō, withdrew with an injury. He won his last two bouts to salvage a 4–11 record but he was relegated back to jūryō. He recorded only seven wins in March but secured a second promotion with a 10–5 result in May. He barely avoided relegation with a 7–8 record in July but recorded his first kachi-koshi in the top division with nine wins in September. Ranked at a new high of maegashira 9 he recorded six wins in November and was dropped to maegashira 11 for the January 2017 tournament when he posted an 8–7 record. He returned to maegashira 9 in March and retained his rank for the May tournament despite a 7–8 result. He continued to maintain his place in the top division for the rest of that year, reaching a new career-best rank of maegashira 4 in July.
Fighting style
Kagayaki is an oshi and tsuki specialist, which means he relies on pushing and thrusting techniques to defeat his opponents rather than belt-wrestling. His most common winning technique is oshidashi which accounts for 46% of his wins.
