During the Warring States period, feudal lords in Japan were competing against one another and were therefore eager to attract Portuguese trade. This provided an opportunity for Christianity to be spread within their domains.
Ceramics from places like China and Southeast Asia have been excavated from the remains of Hinoe castle. These items help to show how much the Arima clan prospered from trade.
The gold-leaf roof tiles which have been discovered in the ruins of Hinoe castle suggest that the Arima clan was deeply connected with the centre of political power
Many Christians fought in the Amakusa-Shimabara rebellion. At Hara castle, an estimated 27,000 men, women and children lost their lives.
A great number of Christian artefacts have been uncovered during archaeological excavations at Hara castle.