2023 Japan Championships in Athletics

The 107th Japan Championships in Athletics (第107回日本陸上競技選手権大会) was held at Nagai Stadium in Osaka. Organised by JAAF, the four-day competition took place from 1–4 June and served as the national championships in track and field for Japan.

This competition was also for the qualifying trial for the Japan team at the 2023 World Championships.

The schedule of events other than this tournament is as follows:
 * 35 kilometres race walk - 16 April (Wajima City)
 * 10,000 m -
 * Combined - 6–7 May at the Nagai Stadium
 * Relays - (National)
 * Indoor competition - (Osaka Castle Hall, Osaka)
 * 20 kilometres race walk -
 * Cross-country race -

Men

 * Complete results