[5] Iwasaki's pioneering work on perpendicular magnetic recording has been integral to the development of modern hard disk drives.

[7] Iwasaki's early research on ac bias recording was instrumental in the development of "high energy" metal particle tape used, for example, in "Hi8" video cassettes.

The CoCr medium was designed with a strong anisotropy aligned *perpendicular* to the tape surface rather than in-plane.

After its introduction in 2005, perpendicular recording was quickly adopted as the preferred data storage approach for all Hard Disk Drives.

[18] Iwasaki was the subject of oral history interviews by the Computer History Museum in 2016[19] and by the IEEE Magnetics Society in 2022[6] Iwasaki is an honorary member of the IEICE[20] and the Magnetics Society of Japan, and a Life Fellow of the IEEE.