open trading houses). This survey was done almost entirely by measuring walking steps and taking astronomical observations. They made it to Bekkai 別解 in far northeast Hokkaido. In total they walked and surveyed 3,244 km. The results of the first survey, paid for almost entirely by Inō's own funds, helped the shogunal government understand the significance of the work. For this reason, starting with the second expedition (departing Edo in the summer of 1801) he received more support, and the route was more ambitious, covering most of the eastern seaboard from just south of Edo to the far northern tip of Honshū, and then the interior portion on the return trip. This expedition lasted approximately six months and covered 3,122 km. After the second survey, more and more trust was put in Inō's endeavor. By the fifth expedition, there were 19 people involved, they covered almost 7,000 km. On the 8th expedition they covered over 13,000 km in 914 days, most of it in Kyūshū. By this time Inō was 70 years old, which was decades older than the average lifespan at that time. In addition to his maps, Inō produced scholarly works on surveying and mathematics, including Chikyū sokuenjutsu mondō and Kyūkatsuen hassenhō. Commemoration In November 1995 the Japanese government issued a commemorative 80 yen postage stamp, showing Inō's portrait and a section of his map of Edo. Most of the complete copies of the atlas have been lost or destroyed (often by fire), although a mostly-complete copy of the large-scale map was discovered in the collection of the U.S. Library of Congress in 2001. After his death, Inō was one of 37 people honored at the Hokkaidō Shrine as kami associated with the pioneering efforts of the Japanese government to settle and develop Hokkaidō. Inō Tadataka's grave is located at the temple of Genkū-ji Taitō-ku, Tokyo. The grave was designated a National Historic Site in 1928. Inō Tadataka Former Residence Inō's home in Sawara still exists, and is located on the bank of the Ono River that flows through the city of Katori. It was designated a National Historic Site in 1930. The building was constructed in the Edo period and is a complex consisting of a gate, main building, and attached kitchen, library and kura warehouse. The buildings are all tiled, and the main building has five rooms. The Inō family ranked as one of Sawara's leading