Making her first international appearance, Murakami won the silver medal in the spring girls category at the Mladost Trophy in the 2004–05 season.[3]
In the 2005–06 season, she won silver at the 2005–06 Japan Novice Championships in the Novice B category, which is the lower of the novice levels.[4] This medal earned her a trip to compete in the spring competition, the Gardena Spring Trophy, which she won on the novice level.[5] Murakami competed at the 2006–07 Japan Novice Championships in the Novice A category and placed 7th,[6] and at the 2007–08 Japan Novice Championships in the Novice A category, she placed 5th.[7]
Prior to the JGP Final, Murakami competed at the 2008–09 Japan Junior Championships, which served both as the junior national championships and the qualifier for the Japanese team to the World Junior Championships. Murakami placed 7th in the short program and won the free skating to take the bronze medal,[11][12] which earned her an invitation to compete at the 2008–09 senior national championships. However, as Japan had earned only two berths to the 2009 World Junior Championships, Murakami did not qualify.
At the JGP Final, she placed 2nd in the short program and 3rd in the free skating to place 4th overall.[13] Following the Final, Murakami competed at the 2008–09 Japan Championships, where she placed 7th in the short program, 8th in the free skating, and 7th overall.[14]
She was assigned to compete at the 2010 World Junior Championships, where she won the title after placing second in the short program and first in the free skating.
At the 2010 NHK Trophy, she placed second in the short program behind Carolina Kostner, and fifth in the free skating to capture the bronze medal. During both programs, she landed a triple toe-triple toe combination cleanly. At the 2010 Skate America, she placed second in the short program after singling her double Axel. She placed second in the free skate behind Rachael Flatt and won the gold medal.[16]
Murakami qualified for the 2010–11 Grand Prix Final. She placed third in the short program and second in the free skate on her way to the bronze medal.
She was part of the ladies' team representing Japan at the 2012 ISU World Team Trophy. She placed 3rd in the short program but 8th in the free skating and finished 6th overall.
Murakami finished 4th at the 2013 World Championships setting a personal best score of 189.73 points.
2013–14 season: Four Continents champion
Murakami finished 4th at her first Grand Prix event of the season, the 2013 Cup of China, and then 7th at the 2013 Rostelecom Cup. At 2013–14 Japan Championships, she finished second behind Akiko Suzuki. After the event, she began wearing new boots which caused swelling in her right ankle.[19]
Murakami started off her season by competing at Japan Open, where she placed 4th in the ladies' event and Team Japan finished 3rd overall. She then won a medal on the Grand Prix series, taking bronze at the 2014 Cup of China after placing third in both segments. At the 2014 NHK Trophy, she finished 4th after placing 3rd in the short program and 7th in the free skating. With those results, she was the third alternate for the 2014-15 Grand Prix Final.
At the 2014–15 Japan Championships, Murakami placed 9th in the short program, 4th in the free skate, and fourth overall. She was selected to compete at the 2015 World Championships due to her placements in her Grand Prix events. At Worlds, she placed 4th in the short program, 8th in the free skate and 7th overall, earning season's best scores in all segments.
Murakami then competed at 2015 World Team Trophy where she finished 6th and Team Japan placed third overall. After twisting her ankle during an ice show in late April 2015, she cancelled the rest of her post-season skating appearances.[21]
2015–16 season
Murakami resumed regular training in September 2015.[21] She began her season on the Challenger Series, placing 7th at the U.S. Classic. Her Grand Prix assignments were the 2015 Skate Canada International and 2015 Trophée Éric Bompard.[22] She finished fourth at both events. In France, the second day of competition was cancelled due to the Paris attacks and the short program standings were deemed the final results.
Murakami placed 6th at the Japanese Championships and 7th at the 2016 Four Continents.
2016–17 season
Murakami performed an exhibition program as a special guest at the 2017 World Team Trophy and announced her retirement.[23]
^村上佳菜子が現役を引退 世界選手権5度出場 [Kanako Murakami retires from competition after 5 World Championships appearances] (in Japanese). Sports Nippon. April 23, 2017. Archived from the original on April 27, 2017.