Kōsatsu
The Kōsatsu (, literally "High plaque"), also called Seisatu (, literally "Controlling plaque"), was the public notice of the han-lord's or shogun's proclamations in the Japanese history. They were the local or nationwide laws written on the wooden plate, placed in the kōsatsu-ba of the shukuba or sekisho (関所), the border between han, where there was frequent traffic.

The kōsatsu has been used from the late Nara Period of the Japanese history. One of the kosatsu in the Edo Period was on prohibiting Christianity. 

As the people's literacy rate improved and the modern nation emerged, the kōsatsu was abolished in 1873 and eventually replaced by the Kanpō (Japanese government gazette) and other means.
Q1004391
public notice
Concept
Q841985
han
Concept
Q131767
shogun
Concept
Q1209783
shukuba
Concept
None
sekisho
UNK
関所
UNK
Q189178
Nara Period
Concept
Q184963
Edo Period
Concept
Q8236
literacy rate
Concept
Q11452096
Kanpō
Concept
Q2065227
government gazette
Concept
Q11670187
Kōsatsu
Concept
1873-01-01T00:00:00Z^^http://www.w3.org/2001/XMLSchema#dateTime
1873
DATE
instance of