There was no shortage of people with expert skills among the townspeople of Osaka in the Edo period (1603-1867). Two such people were Shigetomi Hazama (1756-1816) and his son Shigeyoshi Hazama. This is the telescope that Shigeyoshi used to observe heavenly bodies. It was presented to the Tokugawa shogunate by the Netherlands in 1823, and was loaned to Shigeyoshi, who was assigned to an official astronomical measurement duty in Osaka. Shigetomi Hazama was born into a wealthy merchant family in the district of Nagahori in Osaka. He was the first in Japan to complete a Kansei calendar based on Western astronomy, and contributed to the shogunate’s calendric reform. Amid the limited amount of shogunate materials on astronomy, those concerning observations by the Hazamas family have great value for provision of information on astronomical measurements late in the Edo period.