1. In a survey of Japanese high school students, it was found that the terms "mama" and "papa" are more commonly used to refer to parents than traditional terms like "okaasan" and "otousan".
2. Many respondents cited using these terms since early childhood as the reason for their preference, while some switched to "okaasan" and "otousan" during their teenage years due to feelings of embarrassment.
3. The survey suggests that while "mama" and "papa" are becoming increasingly common in Japanese families, there is still a trend towards using more mature-sounding terms as children grow older.