Maps of Japan - History - Edo Period Provinces

Edo Period Provinces

The Tokugawa government initiated a multi-year map-making project. Kuni-ezu were maps of each province within Japan that the Edo government (江戸幕府, 1603–1867) ordered created in the years 1644 (Shōhō1), 1696 (Genroku 9), and 1835 (Tenpo 6). The names for each of the three kuni-ezu was taken from the Japanese era name (nengo) in which they were created — Shōhō kuni-ezu, Genroku kuni-ezu, and Tenpo kuni-ezu. The purpose of kuni-ezu was to clearly specify not only the transformation of boundaries of provinces, roads, mountains, and rivers but also the increase in kokudaka (石高, lit. rice output) following the development of new field. Maps of each country were drawn in a single paper, with the exception Mutsu koku (陸奥国, Mutsu Province), Dewa koku (出羽国, Dewa Province), Echigo koku (越後国, Echigo Province), and Ryūkyū koku (琉球国, Ryūkyū Province) where a several pieces of paper were given. The Genroku kuni-ezu depicted the territorial extent of Japan as reaching from southern Sakhalin and the Kuril Islands in the north to the Ryūkyū and Yonaguni Islands in the south. A major flaw in these maps, however was the unreliability of surveying techniques, which often involved lengths of rope that easily became distorted, resulting in distortions in the map based on the survey as well. This was largely seen as an unavoidable flaw however. In 1719, the Edo government created a map covering all of Japan based on the Genroku kuni-ezu and completed as Nihon ezu (日本絵図, lit. Picture map of Japan). Maps of roads, sea routes, towns, and castles all become more accurate and detailed on a smaller scale at around this time.

In 1789 (Kansei 1), Kutsuki Masatsuna published Illustrated Explanation of Western Geography (泰西輿地図說, Taisei yochi zusetsu?). This daimyo was a rangaku scholar; and this early geographer's work incorporated Western conepts of map-making.