Since an electronic administrative open data strategy was devised in 2012, the promotion of opening data defined as "the data which anyone is free to access, use, modify, and share, and the construction could be based" by Open Knowledge Foundation Japan has been worked on by the Japanese government. In December, 2013, the trial version of data catalogue site "DATA.GO.JP" which enabled the cross-sectional search of public data was shown as a symbolic measure of the actions of open data. This site was managed in earnest from October, 2014, and approximately 18,000 data-set is registered at the present in November, 2016. In this study, it performs example analysis about "DATA.GO.JP". Through this analysis, it clarifies the real image of the data which government office holds and discloses. Specifically, it puts data in order according to a group and shows the whole aspect of public data.
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