Are you asking if Sijun’s sad songs are Japanese? The song "Sijun Sadness" is not Japanese. "Sijun Sadness" is a very classic background music composed by Chen Guoliang for the 97 version of "Dragon Babu". It is accompanied by a section on the death of A'Zhu, played by the erhu, accompanied by orchestra and flute. And Chen Guoliang is Chinese, so the song "Sijun Sadly" is not Japanese.