Log This Dive

Yonaguni Monument

We’ve spent hours arguing over beers about Yonaguni. Is it natural? Man-made? Honestly, when you’re down there, gliding over those colossal, razor-sharp terraces and perpendicular walls, the debate fades away. The sheer scale of it, rising abruptly from the seabed, feels… purposeful. We love tracing the edges of the main structure, the light playing tricks on the colossal steps. It’s undeniably dramatic. Visibility can swing wildly, but when it’s good, the clarity makes the formations feel even more ancient and imposing. Our favourite moments are drifting along the ‘main street’ – a trench that cuts through the largest platform – keeping an eye out for those distinctive hammerhead silhouettes from November to May. They often cruise by in the blue, a stark contrast to the dark rock. We’d suggest going with a local guide who knows the currents; they can be tricky, often a strong surge around the monument itself. It’s a dive for those who appreciate grandeur and a touch of mystery, not necessarily for coral enthusiasts. You’re coming here for the structure, the speculation, and maybe a shark encounter, not to spot a new nudibranch. It's a deep dive into an enigma.