Honda Motor Co., Ltd.

Aiko Ishii

Tadafumi Nogawa

Takurou Masuda

Provided is a navigation server which informs a user of the meaning of the search result of a route considering a primary event through a navigation client. According to a navigation server, it is recognized whether a first index value eindicating the degree of influence of a predetermined primary event on the passage along a searched route connecting a present location pand a destination point pis greater than a first threshold value &#x3b5;. When the first index value eof the previous searched route Ris greater than the first threshold value &#x3b5;, a route Ris re-searched to reduce the first index value e. When the first index value eof the search route Ror Ris the first threshold value &#x3b5;or less, 'confirmation information' indicating as such and the searched route are transmitted to the navigation clientand recognized.

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Tokyo, Japan

Aiko Ishii