Developmental Counselling and Therapy (DCT) represents a co-constructive, developmental, and integrative approach to individual treatment. DCT posits that introducing specific and consistent therapeutic questioning strategies, corresponding to four different cognitive-developmental orientations or worldviews, enables clients to gain an extended perspective on their presenting issues, and thus to recognize a broad range of cognitive, emotional, and behavioral change options. To test this assumption, two investigations involving Japanese subjects were conducted. The findings from both studies indicate that consistent phrasing of therapeutic questions, targeted at specific cognitive-developmental orientations, facilitates subjects to expand their ability to discuss historical events and personality attributes from multiple perspectives. Clinical and research considerations are outlined.