| 摘要 |
A navigation apparatus, which is to be mounted on a movable body, comprises a navigation information acquisition unit, a requirement judgment unit and a control unit. The navigation information acquisition unit acquires navigation information relating to movement of the movable body. The requirement judgment unit judges as whether or not dialog start requirements are satisfied on the basis of the navigation information. The control unit gives a speech to a user to start providing interactive information, in case where the dialog start requirements are satisfied.
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