The Japanese has furigana.
They are the smaller kana placed The above or alongside kanji to indicate its pronunciation.
Please see the following article.
Attached is simple test data.
The furigana text was hidden.
Would you please test this file ?
Aspose.Words.Document doc = new Document("c:\\5658.doc");
ImageSaveOptions imageOptions = new ImageSaveOptions(SaveFormat.Jpeg);
Aspose.words 13.4.0 for .net 2.0