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Haruna Kuboyama
Personal information
Native name	Japanese: 久保山晴菜
Nationality	Japan
Born	5 April 1996 (age 28)
Home town	Saga, Japan
Education	Saga Kita High School [ja]; Fukuoka University;
Sport
Sport	Athletics
Event(s)	400 metres; 100 metres
Club	Imamura Hospital [d]
Achievements and titles
National finals	2021 Japanese Champs; • 400m, 4th; 2022 Japanese Champs; • 400m, 3rd ; 2023 Japanese Champs; • 400m, 1st ; • 200m, 3rd ;
Personal best(s)	100m: 11.55 (+1.5) (2022); 400m: 53.07 (2023);
Medal record
Women's athletics
Representing Japan
Asian Championships
	Updated on 20 April 2024

Haruna Kuboyama (Japanese: 久保山晴菜; born 5 April 1996)^[1] is a Japanese sprinter specializing in the 400 metres. She was the 2023 Japanese Champion in the 400 m, and won a bronze medal in the mixed 4 × 400 m relay at the 2023 Asian Championships.

Career

Beginning as a short sprinter as early as 2014, Kuboyama won the 2018 Japanese University Championships in the 100 metres, running 11.86 into a -2.1 m/s headwind.^[1] At her first Japanese Athletics Championships in 2019, she contested the 100 m and 200 m but did not advance to the finals. She also failed to advance to the 100 m finals at the 2020 Japanese Athletics Championships.^[1]

Kuboyama switched events to the 400 metres in 2021, debuting at 54.90 and eventually finishing 4th at the 2021 Japanese Athletics Championships in 53.72.^[1] After a 3rd-place 400 m finish at the 2022 Japanese Athletics Championships, Kuboyama was named to the Japanese mixed 4 × 400 m team at the 2022 World Championships as an alternate, but she did not get to compete as Japan did not qualify for the finals.^[4]^[1]

Kuboyama achieved her best national results in 2023, winning the 400 m at the national championships and placing 3rd in the 200 m. This earned her selection to Japan's 4 × 400 m, individual 400 m, and mixed 4 × 400 m teams at the 2023 Asian Athletics Championships. After finishing 4th in the individual 400 m, she won a bronze medal running second leg of the mixed relay final, setting a Japanese record of 3:15.71 in the process. The following day she also placed 4th leading off the women's 4 × 400 m.^[1] ^[5]

In April 2024, it was revealed that 2023 Asian Championships 400 m silver medallist Fairda Soliyeva of Uzbekistan failed a test for meldonium, disqualifying her and promoting Kuboyama to the bronze medal.^[6]

Kuboyama began her 2024 season finishing 4th at the Asian Indoor Athletics Championships in the 400 m. She finished 8th at the 2024 Diamond League Shanghai outdoors.^[1]

Personal life

Kuboyama is from Saga, Japan where she attended Saga Kita High School [ja] and Fukuoka University.^[2] She competes representing Imamura Hospital [d].^[3]

Statistics

Personal best progression

400m progression
#	Mark	Pl.	Competition	Venue	Date	Ref.
1	54.90	(Round B)	Shizuoka International Athletics Meet	Fukuroi, Japan	2 May 2021	^[7]
2	53.94		Denka Athletics Challenge Cup	Niigata, Japan	5 Jun 2021	^[8]
3	53.59	(Heat 3)	Japanese Athletics Championships	Osaka, Japan	23 Jun 2021	^[9]
4	53.32	(Heat 2)	Japanese Athletics Championships	Osaka, Japan	8 Jun 2022	^[10]
5	53.24		All Japan Corporate Team Championships	Gifu, Japan	23 Sep 2022	^[11]
6	53.16		Shizuoka International Athletics Meet	Fukuroi, Japan	2 May 2023	^[12]
7	53.07		Kinami Michitaka Memorial Athletics Meet	Osaka, Japan	5 May 2023	^[13]