Abstract
The Real Estate is important property in narrow Japan, and its conjugation consist a base imformation of any industrials. It means the conjugation and management of cadastre is important tasks as governmental and personal. Cadastral information includes geodesic numerical value, legal rights, and compositive information such as each archival records. Cadastre has been researched by 2 ways which are geodesic and legal with a basically chemistry, because its traditional researching were divided into arts course and science course at Japanese colleges in the past. In addition, some tasks of cadastre are coming up from experiences of Hanshin Big Earthquake and Tohoku Big Earthquake 2 years ago.
Which is the problems of boundaries removing and object for rights, and another one is the problem about cutting down damages by a disaster and protecting our life from a disaster. Land and house investigator is active in property registration in Japan, and recently draw attention as the legal professtional of surveying who have knowledge of cadastre. Land and house investigator who ordinally survey at the field and consider the legal problems assume a role of connecting between jurisprudence and surveying.Earth crust moved 5.85m max to south east, went down -1.14m because of this disaster. We can manage the movement value because of we defined values of movement and its angle as a geodesic numerical value by re-surveying primary control marks, and Ministry of Justice published the policy about land moving. But we have had no clear answer yet about rights problem which are getting out on affected properties. We found that neglect histrial obuject as cadastral marks, geographical name (ex. village name), and traditional stories about the land, which are important cadastral information. Japanese academic society researched a only part of cadastre in the past. For Preparing for new disasters we know will come, and keeping up new spatial data, I believe researching about Japanese cadastre should have bigger range of knowledge, we should think about this compositive cadastre more at the JSIK.
