Suzu City, Ishikawa Prefecture Map Miura-ori Tourist Guide Map [Travel Souvenirs] These were received during my travels in 2021. ◎ I will offer the traces of my journey. ＜Reference＞ Miura-ori This is a folding technique based on the research of space structure engineering, devised by Professor Koryo Miura, which opens widely with a small amount of force. Through this research and development, various products have been put into practical use as "Miura-ori" and continue to be utilized daily. The fold lines are zigzag, and each one is a parallelogram, so the folds do not overlap. This technology is also very active in space. Miura-ori was adopted for the opening and closing of solar panels on the Space Flyer Unit, which was launched in 1994, and it was a great success. In addition, in 2005, a research team at Harvard University discovered that "Miura-ori" also exists in the natural world, such as the wings of butterflies before they emerge. Young leaves of European hornbeam and other tree leaves are folded in a Miura-ori shape when they are in the bud stage. It is thought that the Miura-ori structure is the same as the shape that opens efficiently with little energy in the natural world.