Japanese Astronomical Olympics

The Japanese Astronomical Olympics (JAO) serves as the primary selection mechanism for Japan's team to the International Olympiad on Astronomy and Astrophysics (IOAA). The competition tests theoretical knowledge, observational skills, and problem-solving abilities in astronomy and astrophysics. Top performers from JAO proceed to orientation camps and further selection rounds for international representation.

2026 Japan
Official Site
Theory
Final Theory 150 min → Final Theory Problems
Problem 1 (130 pts)
Final Theory
Problem 2 (90 pts)
Final Theory
Problem 3 (90 pts)
Final Theory
Problem 4 (90 pts)
Final Theory
Practical
Final Practical 90 min → Final Practical Problems
Problem 1 (50 pts)
Final Practical
Problem 2 (50 pts)
Final Practical
Problem 3 (100 pts)
Final Practical
2025 Japan
Official Site
Theory
Final Theory 150 min → Final Theory Problems Final Theory Solutions
Problem 1
Final Theory
Problem 2
Final Theory
Problem 3
Final Theory
Problem 4
Final Theory
Practical
Final Practical 90 min → Final Practical Problems Final Practical Solutions
Problem 1
Final Practical
Problem 2
Final Practical
2024 Japan
Official Site
Theory
Final Theory 150 min → Final Theory Problems Final Theory Solutions
Problem 1
Final Theory
Problem 2
Final Theory
Problem 3
Final Theory
Practical
Final Practical 90 min → Final Practical Problems Final Practical Solutions
Problem 1
Final Practical
Problem 2
Final Practical
2023 Japan
Official Site
Paper 180 min → Problems Solutions
Problem 1
Various Topics Related to the Solar System
Problem 2
Extrasolar Planets
Problem 3
Galaxies and Star Formation
Problem 4
Stellar Clusters and Stellar Kinematics