https://www.titech.ac.jp/english/news/2012/025613
In November 2011, Japan's K supercomputer, in a newly upgraded hardware configuration, achieved its original 10-petaflop target—the unprecedented feat of performing 10.51 quadrillion calculations per second—which is the fastest in the world to date. Just months ago in June, when it unveiled this latest supercomputer, with a calculation rate of 8.162 petaflops, Japan had already captured the supercomputer crown—it is three times faster than the runner-up, located in China. https://web-japan.org/trends/11_sci-tech/sci120119.html
https://www.riken.jp/en/collab/resources/kcomputer/
https://factsanddetails.com/japan/cat26/sub163/item2831.html
https://meetingorganizer.copernicus.org/EGU2016/EGU2016-5394.pdf
https://en.wikipedia.org/wiki/K_computer
