Peter Seiichi Shirayanagi (白柳 誠一 Shirayanagi Seiichi, June 17, 1928 - December 30, 2009) was a Cardinal Priest of the Roman Catholic Church and Archbishop of the Roman Catholic Archdiocese of Tokyo.Cardinal Shirayanagi was hospitalized at the beginning of August for cardiac arrhythmia, then suffered a light cerebral hemorrhage, but recovered well after 3 months of rehabilitation. On December 23 he moved to Loyola House where he was taken care of.