Abstract
Legal measures to deal with the issues of “owner-unknown land” are limited to taking certain actions to remove urgent risks on the owner-unknown land or to ask family court for appointing administrators of that land in the current civil law of Japan. Legal reforms are necessary to improve the management of, to reduce the accumulation of, and to prevent the increase of the ownerunknown land by combining civil law measures with public law measures under the basic land policies in Japan to be identified as the promotion of public involvement.
