This is from the first two pages that I have translated so far. Although the main works of Shosan have been translated into English, his Ha Kirish**an (Crush Christianity) has been mostly ignored, probably due to the fact that it is anti-Christian. I have attempted to keep the original meaning, and have avoided adding my own interpretation.
These are his thoughts on Christianity addressed in a text that was presented to various Buddhist temples in 1642. In 1637-38 there had been a rebellion led by 23,000 Christian peasants and Samurai against the local Daimyo (Lord). These texts were presented with the intention of helping to drive out any remaining Christians and to alert the populace about this evil creed.
English translation by Rev. Junpei Genshin, copyright by Rev. Junpei Genshin.
In the Christian teaching they claim there is a supreme being which they call Deus (God), whom they say is the lord of heaven and earth, and is in everything and everywhere. 1,600 years ago he manifested himself in the world to the Southern Barbarian lands* as saviour of all the people. His name, they say, was Jesus.
I ask, why has this almighty Deus manifested himself only once in the world he claims to have made and rules over? And why only to the Southern Barbarians? He must be a truly stupid Deus to think that as free people with a mind of our own that we would easily believe this.
It is said by the followers of Deus that when manifested upon the earth, he was hung on a cross by the unenlightened of the world. Can such a one be considered a god? How is it that a god can be captured and crucified by men?
And now these Kirish**ans have come to Japan, a land of freewill and logic, to spread their magic and evil teachings. Is this not a disgrace, that men would give up their own freewill to follow a Deus who cannot save himself from mere men?
The stupidity and effrontery of the Jesuit missionaries is astounding. They have clearly magnified their own human thoughts and feelings in the form of this Deus and yet worship as if he were apart from their own fabrication.
Clearly these Southern Barbarians cannot see that all around us is subject to cause and effect, the natural events of the universe.
In this Kirish**an sect miraculous events are held in high esteem, and it is said that they are the glory and honour of Deus. I have likewise heard that they cheat and deceive people by the various devices they have created. Clearly those of us with open eyes and free wills know that supernatural miracles are not possible. All about on the earth is natural and the work of nature itself.
Only through free thought and the advancement of wisdom can man live, not relying on the supposed miracles of gods. Man has no need of miracles but self-reliance, self discipline and individual striving.
I ask these Kirish**ans, if your Deus created animals and humans to be different, how could an all-powerful, all-good Deus create humans with a fatal weakness, a predisposition to evil, that will see them sent to an everlasting hell? If that is so, then the casting of people into a hell is solely the work of Deus. How can one worship such an evil Deus?
Kirish**ans are not able to hold their own in argument with even novice Buddhist monks about life and self-nature. Often during questioning they will assert that we simply cannot understand their Deus and that he is above human understanding. Yet the understanding of these Kirish**ans is comparable to frogs in a well.**
These Kirish**ans claim that those who worship this Deus will join him in his kingdom when they die. If the body is dead, what use is a kingdom? How does one expect to travel to such a place when they are naught but dust for the worms? How is it that such a ridiculous claim can come from those who say they are our equals as humans on the earth?
The Kirish**ans make the claim that Deus created humans, but not animals, with a soul. It is quit clear that they consider themselves above all living things. Such a stance from these Southern Barbarians to me is evidence of their childish and uneducated minds. We must cast out every single one of these Kirish**ans and their evil ways.
The bateren (Portuguese Catholic fathers) who have come to Japan have in their own minds constructed a creator of heaven and earth. With their schemes to capture this country for the Southern Barbarians they deceive the people with all kinds of empty words.*
Why do the followers of Deus press their tedious claims with the pretence that they alone know their lord who created heaven and earth? Idle verbosity without substance is most annoying.
Kirish**ans surely love talk of magic and sorcery, what need does a man of intelligence have for such fantasy?
The Kirish**ans gather together to talk to their Deus, but Deus does not answer them in voice. Yet they insist that they are talking to Deus and that Deus is listening to them! They ask for Deus to do favours and to carry out work for them. Kirish**ans are not able to carry out their own work and strive towards their own goals without asking their Deus for help.
The Buddha admonished that relying on supernatural gods is folly, for only by our own wills can we live. Concepts of other-worldly beings with supernatural powers that reign over man are for those who have no self-reliance, no discipline and no self-morals.
Indeed, when we cease to be bound by our own concepts and grasping, or our inclinations of mind, our doubts cease as well, because our knowledge is no longer dependent on anything beyond immediate and direct experience. Humans are fully equipped to just see, right now. Truth is there for those who will open their eyes. Kirish**ans are blinded by a faith in a power that cannot be. Deus, in order to be real, must himself also be subject to the same cause and effect as everything else in the universe.
The Buddha said, "When I speak to you, do not accept what I say in blind faith out of respect for me. You must examine all that I say, think hard and long, and put it to the test, just as a goldsmith examines gold by cutting and heating it to know whether it is genuine gold. If you have doubts, test it out. If you find it is right, accept and follow it. If you find that it is flawed then examine why and think it through. Only when you know how it is flawed can you say so, and only when you know how it is right can you follow it."
Kirish**ans trust only in a blind faith. There is no testing and thinking it through. They have been instructed to believe unquestioningly. Do you think that is a wise thing to do? To follow a teaching unquestioningly is to give up your own mind for that of another's.
Kirish**ans claim that Deus' way is the only way, and that there are penalties for questioning the words of Deus. Why would such a Deus penalise humans for using their own intellect. Isn't the intellect the greatest gift of humans? It makes no sense at all that humans would be restricted in the use of intellect if such a Deus was their creator.
The bateren encourage the slavery of other humans and treat them as items of trade. It is surely against the very freewill of any people to enslave others and to mistreat them. Honour is to be accorded all people including our enemies.
Kirish**ans carry with them a book that records the words of Deus. How is it that a record of the words of Deus exists, yet not a word is spoken by Deus to his people?
Kirish**ans are full of lust, hatred, jealousy and pride. These are things which lead to suffering and self-destruction. Yet Deus is silent I'm told, on how to combat these defilements. Ignorance is the seat of these defilements, and ignorance is the seat of the Kirish**ans faith. They are ignorant of the world about them, and ignorant of their own lives. Just as darkness is removed by light, ignorance is removed by wisdom. But Kirish**ans do not seek wisdom. They claim that man only need follow the wisdom of Deus. What stupidity!
It is evident to me that the Kirish**an religion is a devilish plot by these bateren to take hold of Nihon, to make Nihon into a Kirish**an stronghold subject to the political control of Portugal, as the Spaniards have done to the Philippines.
The Kirish**ans insist that Deus is all-loving, just and good. But the Kirish**ans don't demonstrate the same all-loving, just and goodness that they claim their Deus teaches them. What hypocricy. What advantage can there be in following such a religion?
Not a one of the Kirish**ans can tell of the appearance of this Deus, of what he looks like, of how he is armed or clothed. Yet they still insist that their Deus is real! What foolishness! How can an intelligent man claim something to be true without having first seen it or experienced it or having had others more knowledgeable verify it? We have only the words of these barbarians. They cannot offer any proof, and yet expect [us] to believe? There is simply no perceptual proof. I liken this to a man who falls in love with a woman whom he has not seen.
How is it that these Kirish**ans cannot understand death, impermanence, non-self when they have the words of their very creator in a text? Does not their creator tell them of these things? Does he hold back the very knowledge of life to his followers?
How is it that this Deus created the world as the Kirish**ans have said? If Deus created the world, did he do so out of nothing or did he create something out of something? Something can not be created out of nothing.
It is evident that the Kirish**an religion is rooted in fear and ignorance. If man is created by Deus, then he must belong to Deus and not to himself, but reality shows that man belongs only to nature. Only man is responsible for his own life, man is here because of his own action and the cause of nature alone. Man is neither punished nor rewarded by anyone but himself according to his own good and bad actions.
Kirish**ans claim there is no "salvation" without Deus. Thus a man may have achieved much virtue and lived a righteous life, yet he is still condemned to eternal hell just because he does not believe in Deus.
*The Portugese and the Dutch together with the English were trying to out do each other in trade from Japan. It was no secret that the Portugese were attempting to stockpile munitions for an invasion. The Spanish had already invaded the Philippines and converted the main islands to Christianity.
* Southern barbarians was the term used to refer to Europeans in general.
** There is a story about how frogs know only about the world from within their limited space within a well.
These opinons on Christianity are largely still held by Japanese Buddhists today, especially within most Zen traditions.***
Sometimes it is interesting to see how the non-Christian world views Christianity. I found this on another website (supposedly only about 2/3s of the document is represented here with the rest coming later) that I frequent and present it for discussion (let’s keep it civil please)
This would have been written just before contact with the west was cut off then. I have a great interest in Japanese history, but I've been studying the period when it was closed to the West for the most part, predominantly focusing on the mid 18th century, so I rarely have an opportunity to read about the Japanese reaction to contact with the west and western ideas/religion before that period of isolation began unless I deliberately go out of my way to look for something. Very interesting. 
this is surprising to me, I hadn't really realized that Christianity had come to Japan with any popularity at any point before the Meiji period. I know that Japan wasn't completely isolated before that, but I hadn't realized that there might have been that kind of influence by Christianity any time before that.
~runs for her life~ 
