2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/107928In this note I shall review the Japan-Italy cooperative work in high energy collider experiments, in particular OPAL at LEP, CDF at Fermilab, ZEUS at HERA and ATLAS at the future LHC.Invited paper at the Italy-Japan Int. Symposium, Nagoya Univ., 15/10/2001History and Philosophy of Physicstext