Douglass-Ishizaka (known as Ishizaka) started playing the piano at age four, was a member of the Ishizaka Trio for 16 years with her brothers, and graduated from Hochschule für Musik Köln. As a solo pianist, she has performed concerts throughout Europe, North America, and Japan, as well as appearing with the Beethoven Orchester Bonn, the Klassische Philharmonie, and the Jackson Symphony Orchestra (Michigan).
In 1998 Ishizaka was the winner of the Deutscher Musikwettbewerb (German Music Competition), along with her brothers Kiyondo Ishizaka and Danjulo Ishizaka.
Ishizaka is part of the Open Goldberg Variations, a Kickstarter-funded, and Bösendorfer-sponsored team that recorded Johann Sebastian Bach's Goldberg Variations and released the score and recordings into the public domain in May, 2012.
Ishizaka's interpretation is characterised by straightforward musicianship, immaculate technical aplomb, and a warm, beautifully modulated sonority. Counterpoint passes back and forth between the hands in a conversational and judiciously balanced manner, while a strong lyrical impulse informs the cross-handed variations' rapid, bravura passages.— Jed Distler, Gramophone Magazine
In November 2013 Ishizaka and Open Goldberg Project completed another Kickstarter project to fund the recording Book I of Bach's Well-Tempered Clavier. The new recording was released into the public domain in March, 2015.
James Oestreich, reviewing for The New York Times, reported that Ishizaka is a "gifted and obviously devoted Bachian" and that she "performed the 24 preludes and fugues of Book 1 from memory and without major flaw".
Ishizaka made her debut as a composer on March 19, 2016, with her performance of Bach's The Art of the Fugue featuring her own completion of the final fugue. In 2017, she then recorded The Art of the Fugue, including her completion, and released it under a Creative Commons license, available for download in audiophile quality  from her website.
- "He had learned in prison that real physical power comes from whole-body exercises such as the squat and deadlift. When I showed alacrity and some talent for the pursuit, he introduced me to a retired Persian weightlifting champion who managed to instill a sense of the purity and respect for the sport. I eventually moved to Cologne from Bonn to be near the weightlifting club, carefully choosing an apartment within walking distance so that I could train four days a week."
Her weight training led to a change in her pianistic technique:
- "In my early 20s, I had very thin arms - I couldn't get a beautiful sound out of the piano and I got very tired playing, say, two Chopin études in a row. As I got stronger, I found a way of using my shoulders, arms, and back to produce the sound. These days I only use my fingers for support."
She trains with 265lb of weights after practicing piano to maintain her piano performance level.
- "Kimiko Douglass-Ishizaka, Piano and Weightlifting", Westdeutscher Rundfunk. Retrieved 25 June 2011.
- Hadel, Andreas (2005). "KDK DM05 Broschure" (PDF). Power Training. Archived from the original (PDF) on 2013-12-30.
- "Biography", Kimiko Ishizaka web page. Retrieved 14 December 2011.
- "Open Goldberg Variations - Setting Bach Free", Kickstarter. Retrieved 26 June 2011.
- "Bösendorfer Sponsors the Open Goldberg Project Archived 2013-12-20 at the Wayback Machine.", boesendorfer.com. Retrieved 26 June 2011.
- "Open Goldberg Variations Raises $16,000 in 20 Days for 'Open Source Bach'", opengoldbergvariations.org, 25 March 2011. Retrieved 26 June 2011.
- OpenGoldberg. "The Open Goldberg Variations Project - Setting Bach's Music Free", YouTube, 6 March 2011. Retrieved 25 June 2011.
- The Open Goldberg Variations Downloads"
- Distler, Jed (September 2012). "'Open Goldberg Variations'". Gramophone (Awards): 86.
- ROSENBERG, Donald (June 1, 2015). "Gramophone talks to... Kimiko Ishizaka". Gramophone Magazine.
- OESTREICH, James (September 12, 2012). "KIMIKO ISHIZAKA". New York Times.
- "Kimiko Ishizaka plays Chopin on an 1842 Pleyel". Kickstarter. Retrieved 20 April 2015.
- "Perfectly right for this performer at this time - Kimiko Ishizaka performs The Art of Fugue with her own completion".
- "J.S. Bach: The Art of the Fugue".
- Final Note Magazine, From Weightlifting to the Well-Tempered Klavier: Kimiko Ishizaka, December 2016.
- "Gramophone talks to Kimiko Ishhizaka", [[Gramophone (magazine)|]], June 2015.
- Conny Högg. "Beigeistert am Piano und überzeugt an der Hantel: Kimiko Douglass Archived 2013-12-19 at the Wayback Machine.", Netzathleten Magazin, 08.12.2008. Retrieved 26 June 2011.
- Nelie Satie. "Nach dem Scherenschnitt ein perfekter Auftrit". Gewichtheben DM Rodewisch. Retrieved 26 June 2011.
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