Based on Abraham Maslow's level of self-actualization and Buckmaster's Reflections of Self and Environment (ROSE), Schantz & Buckmaster (1984) developed instrument (Reflections of Self by Youth:ROSY) to measure self-actualizing growth in preadolescents. In the present research, it is conducted to ROSY for use with 5th grade in elementary school and 2nd. grade student in junior high school. One hundred and thirty five students, 75 second graders and 78 2nd graders, were investigated through the questionnaire (ROSY). The moderate alpha coefficients were calculated for Factor 1 and Factor 2, (respectively, α=.45, .82) and suggests moderate reliable measure of the ROSY. Mean scores were analyzed by ANOVA(grad : 5th vs. 2nd×gender : male vs. female). As a result, the difference by the grade or gender, and interaction of grade and gender were obtained in some items. Especially, a significant age difference and interaction were found in the item that "I wish I were perfect" and "People can depend on me", and a significant gender difference and interaction were found in the item that "I like to be the center of attention.". Interaction effect was obtained in the Factor 1(ROSY). These results suggest that ROSY is useful for Japanese students(5th elementary school children and 2nd junior high school children).