| 1979 |
Graduated from School of Dentistry, Nihon Univ. |
| 1981 |
Graduated from Orthodontic Dept., Univ. of Pennsylvania |
| 1981 |
Opened 1st orthodontic office, Ikeda Orthodontics, in Asakusa, Tokyo |
| 1987 |
Opened 2nd orthodontic office, Hillside View Orthodontics, in Daikanyama, Tokyo |
| 1989 |
Certified by American Board of Orthodontecs |
| 1985-87 |
Established Roth/Williamsn Center in Japan
Engaged in postgraduate education of orthodontists |
| 1990- |
President of Roth/Williams International Society of Orthodontists |
| 2007 |
integrated at Shibuya-ku, Tokyo |