* Nuclear weapons sensitive point in Japan because of North Korea
* Abe says Japan is committed to a world free of nuclear weapons
* Pope comforts victims of 2011 Fukushima nuclear reactor disaster
* Trip ends on Tuesday after Mass in Toyko’s Catholic university (Recasts with meeting with prime minister, diplomatic corps)
By Philip Pullella and Elaine Lies
TOKYO, Nov 25 (Reuters) – Pope Francis appealed on Monday to world leaders to ensure that nuclear weapons are never used again, a day after he visited Hiroshima and Nagasaki, the only cities ever to be hit by atomic bombs.
Nuclear disarmament has been a key theme of…