Speakers: - Shun ISHII, Keio University, Japan - Nao KOMIYAMA, Osaka University,Japan - Séverin PHILIP, Stockholm University, Sweden - Simon RUTARD, Nagoya University,Japan - Koichiro SAWADA, RIMS Kyoto University, Japan - Reiya TACHIHARA, RIMS Kyoto University, Japan - Naganori YAMAGUCHI, Institute of Science Tokyo, Japan [URL] http://www4.math.sci.osaka-u.ac.jp/~nakamura/ArithmeticDay2025/