The following are the national records in athletics in Japan maintained by Japan's Association of Athletics Federations (JAAF).
Outdoor
Key to tables: Awaiting ratification Record not kept by JAAF
+ = en route to a longer distance
A = affected by altitude
a = aided road course according to IAAF rule 260.28
# = not recognised by federation
References
List of Japanese records in athletics Wikipedia(Text) CC BY-SA