Fugaku still reigns as the world’s fastest supercomputer Fugaku still reigns as the world’s fastest supercomputer The June 2021 TOP500 list of the fastest supercomputers has Fugaku ranked at number one, attaining the top slot for the third time and still three times faster than any other. Credit: Fujitsu Fugaku, the supercomputer built by Fujitsu, remains at number one in the TOP500 list of the fastest supercomputers in the world, where it is still three times faster than the nearest competition. The contest for the fastest remains tight, with only one new entry into the top 10 on the latest list—Perlmutter, at the National Energy Research Scientific Computing (NERSC