Looking for the spindle in living cells
While studying with Katsuma Dan at Tokyo University, Inoué addressed how to see the division spindle inside a living sea urchin egg. Fixed cells revealed structures but not their dynamics directly. At Misaki Marine Biological Station in 1947, he assembled a polarized-light microscope from limited available equipment to investigate living cells.
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Recording division over time
With assistance from Jean Clark Dan, he entered Princeton in 1948 and earned his doctorate in 1951 while improving the microscope. He showed a film of dividing living cells at Woods Hole, making changes in spindle fibers visible through time rather than reconstructing movement solely from separately fixed specimens.
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Cameras and contrast enhancement
Inoué subsequently combined cameras with microscopes and computer-assisted contrast enhancement to reveal fine cellular detail. In the early 1980s, he and Robert and Nina Allen independently advanced video microscopy at the MBL. Such methods converted weak optical differences into clearer, recordable images.
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Instruments, courses and books
Inoué joined the Marine Biological Laboratory as a senior scientist in 1982, following appointments at universities including Rochester, Dartmouth and Pennsylvania. He helped organize quantitative light-microscopy training and published Video Microscopy in 1986, bringing instrument development together with cell research and practical instruction.
References: [1]