The Ominous rumblings of Simolandia is a gargantuan, safe nation, ruled by Great Tengu with an even hand, and remarkable for its anti-smoking policies, punitive income tax rates, and stringent health and safety legislation. The compassionate, democratic, cheerful population of 24.59 billion Yōkai are fiercely patriotic and enjoy great social equality; they tend to view other, more capitalist countries as somewhat immoral and corrupt.

The medium-sized, socially-minded government juggles the competing demands of Education, Administration, and Environment. It meets to discuss matters of state in the capital city of Yōkai Mountain. The average income tax rate is 95.1%.

The all-consuming Yōkai economy, worth a remarkable 5,748 trillion Mons a year, is driven entirely by a combination of government and state-owned industry, with private enterprise illegal. The industrial sector, which is highly specialized, is mostly made up of the Information Technology industry, with significant contributions from Book Publishing. Average income is an amazing 233,787 Mons, and distributed extremely evenly, with practically no difference between the richest and poorest citizens.

Prenuptial contracts have replaced diamond rings in marriage proposals, weather forecasts are accurate but nobody has the bandwidth to view them, party leaders rely on horoscopes to create "ticket balance", and the media seems excessively interested in what Great Tengu is wearing this season. Crime, especially youth-related, is totally unknown. Simolandia's national animal is the Mokele-mbembe, which frolics freely in the nation's many lush forests, and its national religion is Shinto.

Simolandia is ranked 520^th in the world and 1^st in New Gensokyo for Most Scientifically Advanced, scoring 1,184.99 on the Kurzweil Singularity Index.