On 14 June 1825 Heinrich Bürger was appointed by the Dutch government as the assistant of Philipp Franz von Siebold on the isle of Dejima (Nagasaki, Japan) for the "natural research" in Japan.
Pada tanggal 14 Juni 1825, Heinrich Bürger diangkat pemerintah Hindia Belanda sebagai asisten Philipp Franz von Siebold di Dejima (Nagasaki, Jepang) untuk "penelitian alam" di sana.