Mount Fuji's Last Letter

A legendary climber vanishes during a routine ascent of Japan's most iconic peak. The only thing left behind is a sealed envelope found at the summit, addressed: "To whoever reaches the summit after me."Takashi, a veteran mountain rescue leader, has spent his life saving others from the heights. But when he opens the letter left by his mentor, Sora, he realizes he is no longer on a simple rescue mission.
He is the first witness to a life-threatening conspiracy that reaches from the mountain's deep volcanic veins to the highest levels of corporate power. As a massive storm rolls in and the mountain begins to tremble with unnatural force, Takashi and a determined medic named Hina must navigate a treacherous path of illegal mining, toxic waste, and professional assassins. Across the frozen ridges and through the haunted Sea of Trees, they carry the only evidence that can stop a catastrophic environmental disaster.
In this gripping survival mystery, the climb is only the beginning. To protect the heart of Mount Fuji, Takashi will have to face the ultimate betrayal and risk everything to deliver a message the world was never meant to hear. Some secrets are too heavy to carry back down, and some truths can only be found above the clouds.