Kaan had become a
pen-friend of an English Congregationalist and through this contact was attracted to the denomination. In 1952 he commenced studies at
Western College, Bristol, and in 1955 he was ordained as a Congregational
minister and took up his first pastorate at the Windsor Road Congregational Church in
Barry, south Wales. In 1963, he was
called to Pilgrim Church in
Plymouth, where the congregation were particularly responsive to his writing talents. In 1968, Kaan was sent to
Geneva as minister-secretary of the
International Congregational Council, to help unite it with the
Presbyterian Alliance to form the
World Alliance of Reformed Churches. With the Alliance until 1978, his work centred on issues of human rights, inter-church relations, and communications, editing the Alliance's journal and co-producing the multilingual radio programme
Intervox. During this time, Kaan served as chairman of the
Council for World Mission, an offshoot of the overseas missionary work of the British Congregational churches. He claimed to have visited faith communities in 83 countries. He also gained an honorary
Th.D. from
Debrecen Theological Academy (Hungary) and a
Ph.D. from
Geneva Theological College. The nomadic life-style did not suit Kaan, however, and, wanting to be closer to people, he became
Moderator of the West Midlands province of the United Reformed Church (URC), a post he held for seven years. This was followed in 1985 by a local
Anglican,
Baptist,
Methodist and URC team ministry in
Swindon; his final ministry. Kaan's formal ministry ended in 1989, but he continued work with a four-year term as honorary secretary of the Churches' Human Rights Forum in Britain and Ireland. His hymnwriting also continued. ==Hymn writing==