Via the French site of "cakos"...
JAPAN POST's commemorative issue reads: "Current Japanese Police Regulations were inacted on July 1st 1954, and this year is the 50th anniversaries. It protected right of the individual and freedom and for public safety and order maintenance, it guaranteed the management and management of the police who is based on democratic idea, the unit of police management in the metropolis and districts unification, efficiently accomplishing duty it was enforced in purpose."