Abstract: It is a great honour to present this memorial tribute to the Founder President of the now undisputedly world-premier ICF, The International Congress on Fracture. I first met this legendary scientist and engineer during the meetings of the ICF Founding Council in Brighton, UK in 1969 and it has been my privilege for us to have been enduring colleagues and friends 1969–2017 working in unanimity and close harmony together on the many developments in ICF following Professor Yokobori’s enduring and imaginative micro/macro unifying vision. We were last together in October 2010 at a famous ICF Interquadrennial Conference in Sendai, Japan (published in another IJSFC volume) exploring further strategies for the evolved, multi-stranded ICF as a closely integrated duo 1969–2017.