VATICAN CITY -- Theologians must explore and debate disputed questions, at times even taking "risks" with what they propose, but those discussions should take place within the academy so as not to confuse the faithful, Pope Francis said.

ABOARD THE PAPAL FLIGHT FROM JAPAN -- Questions about Vatican finances, especially those involving a real estate deal in London, are serious, but they also are a sign that reforms begun by Pope Benedict XVI are working, Pope Francis said.

TOKYO -- Pope Francis spent his last morning in Japan at the Jesuit-run Sophia University, celebrating Mass with his Jesuit confreres, visiting aged members of the Jesuit community and addressing students and staff.

HIROSHIMA, Japan -- Saying it is "perverse" to think the threat of nuclear weapons makes the world safer, Pope Francis urged a renewed commitment to disarmament and to the international treaties designed to limit or eliminate nuclear weapons.

TOKYO -- Describing himself as a "missionary pilgrim," Pope Francis finally fulfilled a more than five-decade-old desire to share the Gospel in Japan.

BANGKOK -- Meeting Thai religious leaders and then celebrating Mass with Catholic young adults, Pope Francis encouraged them to strengthen a culture that treasures the past, holds fast to faith, is unafraid of differences and always seeks a way to promote dialogue and cooperation.

THA KHAM, Thailand -- In a large, predominantly Catholic village outside Bangkok, tens of thousands of people lined the roads and filled the grounds of a church complex to greet Pope Francis.

BANGKOK -- Calling migration "one of the principal moral issues" facing humanity today, Pope Francis thanked the government and people of Thailand for the way they've welcomed migrants and refugees, but he urged greater efforts to protect migrants and poor Thais from human trafficking.

VATICAN CITY -- In a message to young Catholics in Vietnam, Pope Francis offered prayers for a group of Vietnamese migrants who died while being smuggled into Great Britain in late October.