[3] In 1604, at the age of 28, Adami sailed from Macau to Japan on a junk and began learning Japanese on the island of Kyusyu in Omura.
He wrote an examination to gain a degree in theology in Japan on 23 September 1604, but was thrown out of Omura with other priests the same year.
In 1607, he became the chief priest of the rectory of Yanagawa in Chikugo Province, where he engaged in missionary work for seven years with Joam Yama, a monk.
[6] Adami return to Amakusa in Kyushu, Japan, in July 1618, with several Japanese monks and remained in Oyano (now Kami-Amakusa) until 1619.
[3] However, persecution in Kyushu had become so severe that he went to Oshu in 1620, the northeastern part of Honshu (Japan’s main island), where he engaged in missionary work with Yama.
Seventeen Christian leaders in Oshu including Paul Chozaemon Shibayama, Joam Kiuemon Omori, Syusui Nakamaki, and Sandaiyu Sakamoto sent a letter of thanks to the Pope in 1621.
[14] In a letter dated 10 June 1623 regarding missionary work from April 1622 to April 1623 in Yonezawa, Wakamatsu, Mogami region, Adami reported that infighting and persecution began in Inawashiro after Echigo became ill. Saemonsuke Oka, a nephew of Echigo, was baptised but later committed apostasy.
[18] Cosmo Kazue Hayashi, a long-time vassal and the treasurer of Inawashiro Castle, was martyred by decapitation in Aizu by order of Saemonsuke in 1626.