Catholic Church in Japan
The Catholic Church in Japan is part of the worldwide Catholic Church, under the spiritual leadership of the pope in Rome. In 2005, there were approximately 509,000 Catholics in Japan—just under 0.5% of the total population, and by 2014, there were around 440,000 Japanese Catholics. There are 16 dioceses, including three archdioceses, with 1589 priests and 848 parishes in the country. The bishops of the dioceses form the Catholic Bishops' Conference of Japan, the episcopal conference of the nation. The main liturgical rites employed in Japan are those of the Roman Catholic Church.

The current apostolic nuncio (the Holy See's diplomatic ambassador and delegate to the local church) to Japan is Archbishop Joseph Chennoth.

Christianity was introduced to Japan by the Jesuits, such as the Spaniard St. Francis Xavier and the Italian Alessandro Valignano. Portuguese Catholics founded the port of Nagasaki, considered at its founding to be an important Christian center in the Far East, though this distinction is now obsolete. There is a modern Japanese translation of the whole Bible by Federico Barbaro, an Italian missionary. Nowadays, many Japanese Catholics are ethnic Japanese from Brazil and Peru and naturalized Japanese Filipinos.

The Personal Ordinariate of Our Lady of the Southern Cross, a personal ordinariate within the Catholic Church originally created as a means for Anglicans to enter communion with Rome while maintaining their patrimony, has also begun to form in Japan. As of 2015, it has two congregations.
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