It has been learned that problematic data was submitted for a Defense Ministry survey of a candidate site in western Japan for the deployment of a missile defense system.
The revelation follows a similar problem at another candidate site in northern Japan.
The Defense Ministry plans to deploy the land-based missile interceptor system known as Aegis Ashore in Akita City in Akita Prefecture and Hagi City in Yamaguchi Prefecture.
Earlier this week, Defense Minister Takeshi Iwaya apologized to the governor of Akita Prefecture and the mayor of Akita City for mistakes in land survey data and other issues related to the planned deployment.
In the survey data for the Yamaguchi Prefecture site, the height of a hill near Hagi City is two meters higher than the figure given by the Geospatial Information Authority of Japan. The Defense Ministry used Google Earth maps for the references.
The ministry claims this is not a mistake, because there is no official standard for deciding such heights. It also says the difference is just 2 meters and will not affect judgments on the suitability of the deployment.
The ministry plans to conduct additional measurements, review its references and offer Yamaguchi Prefecture a new briefing to dispel doubts over the deployment plan.