Hidé Ishiguro, a Japanese analytic philosopher and emeritus professor at Keio University in Tokyo, died on February 20, 2026.
Born in Tokyo in August 1931, she studied at Tokyo University before pursuing graduate work at the Sorbonne and earning a doctorate in philosophy at Somerville College, Oxford. At Oxford, she was taught by G.E.M.
Anscombe and supervised by Peter Strawson and Gilbert Ryle. Ishiguro was regarded as an expert on Gottfried Wilhelm Leibniz, publishing many papers on his work, and was also a Wittgenstein scholar. She later held posts as Reader in Philosophy at University College London and Professor of Philosophy at Columbia University.
Hidé Ishiguro (Japanese: 石黒ひで, Ishiguro Hidé; 4 August 1931 – 18 February 2026) was a Japanese analytic philosopher and emeritus professor at Keio University, Tokyo. She is considered an expert on the philosopher Gottfried Wilhelm Leibniz on whom she published many papers. She was also a Wittgenstein scholar.