The Thomasian Martyrs were the Dominican Catholic priests who became administrators, professors, or students in the University of Santo Tomas, Manila. All of them gave up their lives for their Christian faith, some in Japan, others in Vietnam, and in the 20th century, in Spain during the Spanish Civil War. St. Lorenzo Ruiz de Manila was among the lay companions of the Thomasian martyrs of Japan.
Conversion of some Japanese to the Christian faith took place between the years 1549–1640 in Japan through the efforts of missionary evangelizers. During this era, the country was ruled by the bakufu, a military government headed by the Shoguns who governed the country in the name of the Emperor. The Emperor at this time had become a mere figurehead, secluded in his palace in Kyoto.
Factors in the outbreak of severe repression of Christianity in Japan certainly included the fear of the Shoguns of all foreign influence. Contributory were the quarrels between Christian denominations, and imprudent acts of foreign navigators.
Born in León, Spain, Antonio Gonzalez entered the Dominican Order at the age of 16. His favorite saint was St. Peter of Verona, the protomartyr of the Dominican order, thus his religious enthusiasm gave rise to his living desire for martyrdom. When an invitation was sent to their convent asking for volunteer missionaries for the Far East, González was among those who eagerly volunteered. His target destination was Japan, but he had to prepare for this mission in the Philippines. He arrived in Manila in May 1632. He became professor and acting rector of the University of Santo Tomas. In 1636, he was finally able to fulfill his dream of going to Japan. After a year, he was arrested while proudly wearing his habit. After tremendous torture, he was found dead in his cell at the dawn of September 24, 1637.