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How did Igarashi Takenobu turn letters into structural forms for his Expo ’85 poster proposal?

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In his 1982 poster proposal for Expo ’85, Igarashi Takenobu transformed letters into structural forms by utilizing his signature design vocabulary, which included points, lines, planes, grids, and isometric perspectives.1

By applying these elements, he effectively "pulled apart" the letters to reveal their inner structures. This deconstruction served a dual purpose: it functioned as an imaginative aesthetic experiment while simultaneously acting as a commercial reference to his client, the construction industry.1