Discover Japan's stories—across time, across language.

| Original Title | 地底獣国 |
|---|---|
| Author | 久生 十蘭 |
| Genre | Fantasy & Sci-Fi |
| Author Type | Male Author |
| Summary | In 1930s Soviet Russia, amidst Stalinist purges and clandestine state projects, a perilous expedition unfolds under the guise of scientific progress. Dr. Yaroshevsky leads a team into Siberia’s frozen wilderness to investigate a mysterious geological anomaly—a hidden lava tunnel stretching toward Japan’s northern frontier. Funded by a regime obsessed with military dominance, their mission conceals a darker purpose: to forge an underground invasion route that could bypass naval blockades and strike at Japan’s heart. \nAs political paranoia tightens its grip, betrayal fractures the group. Pursued by ruthless agents determined to bury the project’s secrets, Yaroshevsky allies with exiled Japanese fishermen, whose desperate hope for freedom clashes with Soviet machinations. Together, they descend into an abyss of ancient rock formations, subterranean oceans, and primordial hazards—a realm where Cold War ambitions collide with Earth’s primordial wrath. \nHaunted by moral compromises and encroaching doom, the team navigates treachery above and unfathomable dangers below. What begins as a scientific quest unravels into a fight for survival against both human foes and the indifferent horrors of a planet’s hidden veins. The deeper they venture, the clearer it becomes: some discoveries were meant to stay buried. |