E. Kaempfer's paper 'Regnum Japoniae optima ratione, ...' was first published in his Amoenitatum exoticarum ... (1712) and was also published in the appendix of The history of Japan (1728) under title 'An enquiry, whether it be conductive for the good of the Japanese Empire, to keep it shut up, as it now is, and not to suffer its Inhabitants to have any Commerce with foreign nations, either at home or abroad'. This paper was summarily translated from De beschryving van Japan (1733) by Dutch interpreter Shizuki Tadao (1760-1806), and was widely circulated as a transcription under the title Sakoku ron (Discussion of the Closed Country). The intent of E. Kaempfer was to show that Japan had a reason for isolating itself, and that the inhabitants were living in peace and happiness and was thus a favorable account, so in an age of increased external pressure on the Shogunate government to open the country, it was also published under the title Ijin kyofu den (lit. threats of foreigners). The editor, Japanese philosophy scholar Kurosawa Okinamaro (1795-1859), published it because its stated purpose was, "To inform the people of today of the excellence, strength, and venerability of our country (Japan) among the countries of the world."