There is a tendency for Japanese to want to know a certain amount of personal information about someone such as age, position and whether they are married or not, before they feel comfortable talking with a stranger.
日本人には、見知らぬ人と会話を始めてまだくつろいだ気分にならないうちに、相手の、年齢や地位、既婚か未婚かなどの個人的な事柄を知りたがる傾向がある。