Shiawase is a fictional company in the role-playing game Shadowrun. They are a "megacorp," a super powerful multinational company based in Japan. They are responsible for the Supreme Court decision granting corporations, of a certain status, extraterritorial status, not unlike a foreign embassy. Shiawase makes most of its money from power and from heavy industry. Factions of Shiawase are often found to war with one another, causing huge shake-ups and redistributions of stock.