The Knives of Eylis is a colossal, environmentally stunning nation, ruled by Eylis the Punished Dreamer with an iron fist, and notable for its frequent executions, compulsory military service, and anti-smoking policies. The hard-nosed, hard-working, cynical, humorless population of 4.66 billion Silver Whalers are ruled by a mostly-benevolent dictator, who grants the populace the freedom to live their own lives but watches carefully for anyone to slip up.

The relatively small, corrupt, well-organized government is dominated by the Department of Defense, although Environment, Administration, and Law & Order are also considered important, while Spirituality and Social Policy receive no funds. It meets to discuss matters of state in the capital city of the Voidheart. Citizens pay a flat income tax of 28.2%.

The thriving Eylisian economy, worth 509 trillion notes a year, is fairly diversified and dominated by the Arms Manufacturing industry, with significant contributions from Beef-Based Agriculture, Information Technology, and Retail. Black market activity is rampant. State-owned companies are reasonably common. Average income is an impressive 109,299 notes, but there is a significant disparity between incomes, with the richest 10% of citizens earning 369,921 per year while the poor average 23,865, a ratio of 15.5 to 1.

Indigenous tribal elders can be recognised by their designer watches and expensive suits, truncheon-mounted cameras record the beating of criminals in dynamic HD detail, economic output is rising as the chronically depressed are persuaded not to burden society, and commercial ships often report keel and hull damage from coral reef impacts. Crime is a major problem, perhaps because of the country's complete lack of prisons. Eylis's national animal is the whale, which is also the nation's favorite main course, and its national religion is the worship of Drowned Gods.

Eylis is ranked 49,880^th in the world and 9^th in Eientei Gensokyo for Nudest, with 204 cheeks per square mile.