Federation · JPN
Japan national best marks
Best marks by Japan athletes in each event, compiled from the all-time lists we import. Derived national bests — not official national records (see note below).
12
Stored marks
12
Distinct marks shown
Men's Decathlon
Derived 14 Sep 2026
| # | Athlete | Mark | Date | Venue | Age |
|---|---|---|---|---|---|
| 1 | Yuma Maruyama | 8321 | 16 Apr 2026 | — | — |
| 2 | Keisuke Ushiro | 8308 | 1 Jun 2014 | — | — |
| 3 | Akihiko Nakamura | 8180 | 12 Jun 2016 | — | — |
| 4 | Keisuke Ushiro | 8160 | 30 Apr 2016 | — | — |
| 5 | Keisuke Ushiro | 8143 | 27 Apr 2014 | — | — |
| 6 | Keisuke Ushiro | 8088 | 1 Oct 2014 | — | — |
| 7 | Keisuke Ushiro | 8058 | 5 Jul 2015 | — | — |
| 8 | Yuma Maruyama | 8054 | 13 Oct 2025 | — | — |
| 9 | Akihiko Nakamura | 8043 | 26 Apr 2015 | — | — |
| 10 | Keisuke Ushiro | 8037 | 3 Jun 2012 | — | — |
| 11 | Akihiko Nakamura | 8035 | 1 Jun 2014 | — | — |
| 12 | Yuma Maruyama | 8021 | 1 Sep 2024 | — | — |
Every mark in scope within the compiled depth. Equal marks share a rank ("1=" style). An athlete with marks for two nations appears under each nation represented at the time (e.g. Obikwelu under Nigeria and Portugal).
About this derivation
These lists are derived from the marks in our database — including the complete legal all-time lists imported from alltime-athletics.com — grouped by the nation the athlete was representing at each mark. They are not official national records: federations ratify national records under their own eligibility rules, and some marks here may not qualify.