[2] He is now working to produce the Japanese version of Wechsler Intelligence Scale for Children -V. He was also among important members of movement toward "Certified Public Psychologist Bill", which was passed in 2015.

[3] Born in Yamaguchi Prefecture, Japan, Ishikuma earned his bachelor's degree from University of Montevallo in 1985; M.A.

[2] While Lecturer at San Diego State University (1989–1990), he worked with Carol Robinson-Zañartu, Valerie J. Cook-Morales, and Colette Ingraham.

He was influenced by them and learned the assessment and services for children within the environmental and multicultural context and by integration with ecological processes.

For his interests in Rational Emotive Therapy (RET) in Counseling, he had an opportunity to be supervised by Albert Ellis.