Kotaro Ihara

JapanJapanActive
Born
Jan 2, 2007 (19 years old)
Events
Decathlon · 400 m

Kotaro Ihara is a Japan sprinter, born on January 2, 2007. He competes primarily in the 100m, 400m and 1500m.

His personal bests include 11.13 in the 100m, 49.90 in the 400m, 4:32.87 in the 1500m, 16.08 in the 110mH and 1.85 in the HJ. He is currently active on the international athletics circuit, representing Japan.

Personal best · Decathlon6339
2026 season best6548May 9, 2026
Personal best · 400 m49.90
Last competition8th Kyushu Kyoritsu University Challenge MeetOct 31, 2026 · 6.91

As of Nov 13, 2026: Decathlon 6339, 400 m 49.90, 2026 season best 6548 (May 9, 2026) · Last competition: 8th Kyushu Kyoritsu University Challenge Meet, Oct 31, 2026, 6.91 · 19 years old

DisciplineResultAll-time2026
100mMiyazaki 2025Japan 100 m all-time list11.13*848 pts––
400mFukuoka 2024Japan 400 m all-time list49.90864 pts––
1500mFukuoka 2024Japan 1500 m all-time list4:32.87511 pts––
110mHFukuoka 2024Japan 110 m hurdles all-time list16.08723 pts––
HJToyota 2025Japan High Jump all-time list1.85784 pts––
PVGifu 2025Japan Pole Vault all-time list4.00727 pts––

* Wind-assisted (> 2.0 m/s)

Progression

SeasonDisciplineResultWindDateCompetitions
2026HJ 1.81–May 28, 202622nd Asian U20 Athletics Championships
2026PV 4.20–Jul 18, 20265th Kyushu Kyoritsu University Challenge Meet
2026LJ 6.91+0.5Oct 31, 20268th Kyushu Kyoritsu University Challenge Meet
2026100m 11.08+2.9Oct 17, 20267th Kyushu Kyoritsu University Challenge Meet
2026ShotPut(6k 11.61–Jun 6, 2026Japanese U20 Combined Events Championships
2026SP 11.91–Mar 21, 202610th Kyushu Kyoritsu University Challenge Meet
2026110MetresH 15.12–May 23, 20263rd Kyushu Kyoritsu University Challenge Meet, Kyushu Kyoritsu University Stadium, Kitakyushu
2026110mH 15.62+3.8Apr 2, 20261st Kyushu Kyoritsu University Challenge Meet
FAQ

Frequently asked questions

Kotaro Ihara's Decathlon personal best is 6339, set on Aug 23, 2025 in Showa Denko Stadium, Oita (JPN).

Kotaro Ihara competes in the Decathlon and 400 m.

2026 season best: 6548, set on May 9, 2026. Last competition: 8th Kyushu Kyoritsu University Challenge Meet on Oct 31, 2026, 6.91.