2023 Asian Athletics Championships – Men's 400 metres

Men's 400 metres at the 2023 Asian Athletics Championships
Venue	National Stadium
Location	Bangkok, Thailand
Dates	12 July (heats & semi-finals) 13 July (final)
Competitors	26 from 18 nations
Winning time	45.00
Medalists
Kentaro Sato    Japan   Fuga Sato    Japan   Youssef Masrahi    Saudi Arabia

Events at the 2023 Asian Athletics Championships
Track events
100 m	men	women
200 m	men	women
400 m		women
800 m	men	women
1500 m	men	women
5000 m	men	women
10,000 m	men	women
100 m hurdles		women
110 m hurdles	men
400 m hurdles	men	women
3000 m steeplechase	men	women
4 × 100 m relay	men	women
4 × 400 m relay	men	women
	mixed
Road events
20 km walk	men	women
Field events
High jump	men	women
Pole vault	men	women
Long jump	men	women
Triple jump	men	women
Shot put	men	women
Discus throw	men	women
Hammer throw	men	women
Javelin throw	men	women
Combined events
Heptathlon		women
Decathlon	men

The men's 400 metres event at the 2023 Asian Athletics Championships was held on 12 and 13 July.^[1]

Records before the 2023 Asian Athletics Championships

Record	Athlete (nation)	Time (s)	Location	Date
World record[2]	Wayde Van Niekerk (RSA)	43.03	Rio de Janeiro, Brazil	14 August 2016
Asian record[3]	Yousef Masrahi (KSA)	43.93	Beijing, China	23 August 2015
Championship record	Sugath Thilakaratne (SRI)	44.61	Fukuoka, Japan	20 July 1998
World leading[4]	Muzala Samukonga (ZMB)	43.91	Gaborone, Botswana	29 April 2023
Asian leading[5]	Ashraf Osman (QAT)	45.01	Marrakech, Morocco	21 June 2023

Held on 12 July.^[6] First 3 in each heat (Q) and the next 4 fastest (q) qualified for the semi-finals.

Rank	Athlete	Nation	Time	Notes
1	Ashraf Hussen Osman	Qatar	46.22	Q
2	Youssef Masrahi	Saudi Arabia	46.34	Q
3	Rajitha Niranjan Rajakaruna	Sri Lanka	46.52	Q
4	Umajesty Williams	Philippines	47.55
5	Mueed Abdul	Pakistan	48.18
6	Nguyễn Tùng Lâm	Vietnam	48.59
—	Lucky Yooyamadu	Thailand	DQ

Rank	Athlete	Nation	Time	Notes
1	Fuga Sato	Japan	45.97	Q
2	Ammar Ismail Yahya Ibrahim	Qatar	46.27	Q
3	Joshua Atkinson	Thailand	46.74	Q
4	Frederick Ramirez	Philippines	46.77	q
5	Yefim Tarassov	Kazakhstan	47.27	q
6	Hamza Abdullah Al-Jabri	Oman	47.49	q
7	Dilshodbek Boboqulov	Uzbekistan	48.80

Rank	Athlete	Nation	Time	Notes
1	Muhammad Ajmal	India	46.06	Q
2	Kentaro Sato	Japan	46.08	Q
3	Umar Osman	Malaysia	46.72	Q
4	Sarawut Nuansri	Thailand	47.55
5	Rajan Thiruben Thana	Singapore	47.69
6	Kumal Som Bahadur	Nepal	48.33	PB
7	Adam Riffath	Maldives	50.67	PB

Rank	Athlete	Nation	Time	Notes
1	Rajesh Ramesh	India	46.45	Q
2	Aruna Darshana	Sri Lanka	46.56	Q
3	Mikhail Litvin	Kazakhstan	46.86	Q
4	Kim Ui-Yeon	South Korea	47.52	q
5	Trần Đình Sơn	Vietnam	47.85
6	Zubin Percy Muncherji	Singapore	47.97
7	Mohamad Mortada	Lebanon	48.62
8	Abdul Rasheed Ismail	Maldives	50.72	PB

Held on 12 July.^[7] First 3 in each heat (Q) and the next 2 fastest (q) qualified for the final.

Rank	Athlete	Nation	Time	Notes
1	Fuga Sato	Japan	45.61	Q
2	Aruna Darshana	Sri Lanka	45.79	Q
3	Rajesh Ramesh	India	45.91	Q
4	Umar Osman	Malaysia	46.42
5	Frederick Ramirez	Philippines	46.53	PB
6	Mikhail Litvin	Kazakhstan	46.74
7	Kim Ui-yeon	South Korea	47.58
—	Ammar Ismail Yahya Ibrahim	Qatar	DNF

Rank	Athlete	Nation	Time	Notes
1	Kentaro Sato	Japan	45.64	Q
2	Youssef Masrahi	Saudi Arabia	45.66	Q
3	Ashraf Hussen Osman	Qatar	45.66	Q
4	Muhammad Ajmal	India	45.76	q
5	Rajitha Niranjan Rajakaruna	Sri Lanka	46.12	q, PB
6	Joshua Atkinson	Thailand	46.43
7	Yefim Tarassov	Kazakhstan	47.04
8	Hamza Abdullah Al-Jabri	Oman	47.45

Held on 13 July.^[8]

Rank	Lane	Athlete	Nation	Time	Notes
	6	Kentaro Sato	Japan	45.00	PB
	5	Fuga Sato	Japan	45.13	PB
	4	Youssef Masrahi	Saudi Arabia	45.19	SB
4	1	Muhammad Ajmal	India	45.36	PB
5	7	Ashraf Hussen Osman	Qatar	45.61
6	8	Rajesh Ramesh	India	45.67	PB
7	3	Aruna Darshana	Sri Lanka	45.69
8	2	Rajitha Niranjan Rajakaruna	Sri Lanka	46.60