Akamatsu is a company which manufactures computer memory chips. It is not affiliated with any of the megacorporations, but appears to be favored by Shaper Runners.

Akamatsu's business operations are summed up in the card text:

The Akamatsu company was founded on three principles: first, to make the fastest mem chips on the market, second, to turn a profit, and third, to serve as a front for the manufacture of illegal neural-stimulants. It is the last principle that perhaps explains their rabid brand loyalty.