These boards were known as 'Kosatsuba' and served as the primary method of communication between the Shogunate and the local populace.
The information displayed often included the 'Gonin-gumi' (five-family group) mutual surveillance rules, which held entire neighborhoods responsible for individual actions.
The roof over the board was a deliberate architectural choice to ensure the longevity of the paper documents exposed to the mountain weather of the Kiso Valley.
The placement of the bulletin board was strategically chosen to be in the most frequented area of the post town to ensure maximum visibility for travelers.
The Magome-juku Old Official Bulletin Board, or Kosatsuba, served as the primary site for the Tokugawa Shogunate to display laws, prohibitions, and notices to travelers during the Edo period. Located in the center of the historic Magome-juku post town, it is a wooden structure featuring a roofed frame designed to protect public documents from the elements. The current structure is a reconstructed version that replicates the appearance and function of the original bulletin board that governed daily life along the Nakasendo trail. Historically, these boards were used to post directives ranging from the banning of Christianity to the regulation of toll rates for horses and porters. It remains a key landmark that illustrates the strict administrative control exercised over the feudal highways of central Japan.
From the street level, capturing the wooden board with the slope of the historic village in the background.
Combine this visit with a walk along the preserved stone-paved section of the Nakasendo Trail.
Read the informational placards nearby to understand the translation of the historical decrees.
Do not overlook the small, easily missed signage nearby that explains the specific laws once posted on this board.
