Hyasyoda Corporation is one of the "Big Eight" Caldari megacorporations.

In-Game Description
Hyasyoda is one of the oldest of the Caldari mega corporations, having been formed shortly after first contact with the Gallenteans when the Caldari were still in the Industrial Age. It's conservative and cautious, but adheres to the old saying: 'Only the paranoid survive.'
Lore
Conservative and cautious in its business dealings, Hyasyoda focuses mainly on tried and tested subsistence industries, such as agriculture, mining, and consumer products. Its operations are largely confined to the state itself, although it has partnerships with foreign companies to market its many products in foreign territories. Hyasyoda was also the first corporation to champion development of the MTAC (Mechanized Torso-Actuated Chassis) for use in the inhospitable polar regions of Caldari Prime, before making the blueprints commercially available and working with the Caldari armed forces during the First Gallente-Caldari War to upgrade and arm them for combat use. The corporation still holds the rights to many fundamental MTAC design principles, property that it fiercely protects to this day.
Hyasyoda’s corporate culture has evolved very little over its long history. It is an extremely conservative organization, with business strategies that lean heavily toward old-fashioned corporatism and established tradition. The corporation is still largely controlled by the family that founded it, and the social pressure on Hyasyoda employees to conform is as great as ever, even for the Caldari State, where such pressure is a part of daily life.
When the Caldari Providence Directorate came to power, Hyasyoda was one of the loudest critics of the political arrangement and often led opposition to Executor Heth within the CEP, alongside Ishukone Corporation.