Not long after the Jieko Group and Beautiful Country began mobilizing warships on a massive scale toward the Yin-Yang Sea Suppressing Palace, most countries with satellites discovered what was going on.
An island had suddenly appeared in the waters off Hokkaido, Sakura Country, and the countries that detected it were utterly shaken.
Blue Star today was no longer what it had been several centuries ago.
Several centuries ago, humanity's navigational technology had been primitive, and humans had been in the Age of Discovery.
Those adventurers and merchants had often discovered new islands and continents in the vast ocean, such as Columbus discovering the New World—a famous and classic case known throughout Blue Star.
But once the twenty-first century arrived, there were no longer any undiscovered islands on Blue Star. Human footprints had reached every inch of land on the planet.
Now, when an island suddenly emerged—and not a reef formed by a geological volcanic eruption, but an exceptionally enormous island covered in towering trees and sprawling buildings—it struck every country that discovered it like a heavy hammer, leaving them dazed and reeling.
Ancient ruins, extraterrestrial creations, natural wonders, mythological legends—every kind of speculation erupted into heated discussions among the upper echelons and think tanks of various countries.
East Asia, in particular, was exceptionally sensitive to this deep-sea island.
After all, history contained far too many records of immortal mountains beyond the seas. Even the First Emperor, who had unified the realm, had been obsessed with them.
The mysterious island that had appeared in the waters off Hokkaido, Sakura Country, fit the legends of immortal mountains beyond the seas rather well.
But no matter the country, once they understood why the Jieko Group and Beautiful Country had gone to war, they all began mobilizing their own forces.
Those capable of sending