Emperor Naruhito succeeded to the Chrysanthemum Throne after his father Akihito abdicated in a series of rituals and ceremonies in Japan.
In other images from the Asia-Pacific region this week, workers marked May Day with rallies in cities and by demanding better working conditions.
Thailand is preparing for the coronation of King Maha Vajiralongkorn, also known as King Rama X.
In South Korea, children whose heads were shaved as part of a religious event enjoyed an amusement park visit. The children entered temples to experience monastic life for three weeks in advance of Buddha’s birthday on May 12.