4 sentences

1. 作者是日本人吗？

   zuò​zhě shì rì​běn​rén ma?

   Is the author Japanese?

   Source: CCMatrix

2. 他们是日本人吗？

   tā​men shì rì​běn​rén ma?

   Are they Japanese?

   Source: OpenSubtitles

3. 他是日本人吗？

   tā shì rì​běn​rén ma?

   Is he Japanese?

   Source: OpenSubtitles

4. 曾经，日本人在非正式和正式场合都穿和服。

   céng​jīng, rì​běn​rén zài fēi​zhèng​shì hé zhèng​shì chǎng​hé dōu chuān hé​fú.

   At one time, Japanese people wore kimonos for casual and formal occasions.

   Source: UM-Corpus: Education