The first part of 『蘭学事始』 (Rangaku Kotohajime, "the early days of Dutch learning"), an 1815 work by SUGITA Genpaku on the history to date of Dutch (= Western) learning's spread in Japan, online for your cross-cultural pleasure. It's surprisingly readable.

天正慶長の頃、西洋の人漸々（ようよう）わが西鄙（せいひ）に船を渡せしは、陽には交易によせ、陰には欲するところありてなるべし。故にその災ひ起りしを国初以来甚だ厳禁なし給へりと見えたり。これ世に知るところなり。その邪教のことは知らざるところの他事なれば論なし。
When westerners began sending more and more boats to our western shores in the Tenshou and Keichou periods (1573-1615), they openly ("yang") sought trade, but secretly ("yin") wanted other things. [Presumably conversion to Christianity, because...] Disaster ensued, leading to the most extreme prohibitions in the history of the country. This is well known. I do not have all the details of that wicked religion, nor is it relevant here; no more need be said on the subject.

Y'all only get half a bar, in other words. Burrrn!