I have recently developed some sympathy for 19th-Century cartographers. In 1815, Japan was a rather mysterious place, and making a detailed map with romanized placenames can’t have been easy.
Sidzd was apparently Settsu Province.
Map detail extracted from this item at the Library of Congress’ American Memory site. (you’ll need JPEG2000 and MrSID decoders to work with the largest available images; yes, they chose encumbered, poorly-supported formats to store everything…)