Kaisei Yui

Kaisei Yui (油井 快晴, Yui Kaisei; born 6 February 1996 in Shizuoka Prefecture) is a Japanese track and field sprinter who specialized in the 400 metres. He competed in the 4 × 400 metres relay at the 2014 World Indoor Championships without qualifying for the final.^[2]

Kaisei Yui

Personal information
Nationality	Japanese
Born	6 February 1996 (1996-02-06) (age 29) Shizuoka Prefecture, Japan[1]
Alma mater	Juntendo University
Height	1.77 m (5 ft 10 in)[1]
Weight	68 kg (150 lb)
Sport
Country	Japan
Sport	Track and field
Event	400 metres
Achievements and titles
Personal best	400 m: 46.36 (2015)
Medal record Men's athletics Representing  Japan World Junior Championships 2014 Eugene 4×400 m relay World Youth Championships 2013 Donetsk Medley relay

Personal best

Event	Time (s)	Competition	Venue	Date
400 m	46.36	Japanese Championships	Niigata, Japan	27 June 2015

International competition

Year	Competition	Venue	Position	Event	Time	Notes
Representing  Japan and Asia-Pacific (Continental Cup only)
2013	World Youth Championships	Donetsk, Ukraine	11th (sf)	400 m	47.23
			3rd	Medley relay	1:50.52 (relay leg: 4th)	NYB
2014	World Indoor Championships	Sopot, Poland	10th (h)	4×400 m relay	3:12.63 (relay leg: 2nd)	SB
	World Relays	Nassau, Bahamas	2nd (B)	4×400 m relay	3:03.24 (relay leg: 1st)	SB
	World Junior Championships	Eugene, United States	7th	400 m	47.08
			2nd	4×400 m relay	3:04.11 (relay leg: 2nd)	AJR
	Continental Cup	Marrakech, Morocco	4th	4×400 m relay	3:03.77 (relay leg: 3rd)

National title

Year	Competition	Venue	Event	Time
Representing Juntendo University
2016	National University Championships	Osaka, Osaka	4×400 m relay	3:06.79 (relay leg: 4th)