Peter Kibe Kasui was born in 1587 at Urabe in Bungo Province (modern Ōita Prefecture in Kyushu) to a samurai Kibe family — baptized as Pedro / Peter in his childhood.
During the 1614 expulsion of Catholic missionaries by the Tokugawa Shogunate, Peter (age 27) was expelled to Macau — where he undertook studies for the Jesuit priesthood.
Peter undertook the extraordinary journey to Rome to seek priestly ordination — travelling from Macau to Goa to Persia and then across Palestine to Rome, arriving at Rome in 1620 after multiple years of overland travel.
Peter was ordained Catholic priest at Rome on November 15, 1620 — at the Basilica of St. John Lateran. He entered the Society of Jesus at Rome shortly thereafter.
Peter undertook the return journey to Japan through the Portuguese colonial network — attempting multiple secret returns via Vietnam and Manila. Finally, in 1630, he succeeded in re-entering the Tokugawa-Japan Catholic underground.
For the 9 years (1630–1639), Peter undertook the secret Jesuit mission to the hidden Japanese Catholic community — travelling through the Japanese countryside disguised as a farmer, celebrating the secret Masses.
Arrested in March 1639, Peter was taken to Edo and subjected to the Tokugawa 'pit torture' (tsurushi) — suspended inverted in a pit filled with excrement for multiple days. Peter refused to apostatize and died in the pit on July 4, 1639.

