If you visit Owakudani, the famous volcanic valley in Hakone, there is one thing you absolutely cannot miss: the legendary Kuro-tamago, or Black Eggs. These aren’t your average snacks—they are part of a centuries-old tradition and offer a very special “benefit”!
Despite their jet-black shells, these are actually regular chicken eggs. They are boiled in Hakone’s natural hot spring water, which is rich in sulfur and iron. A chemical reaction turns the shells black, while the inside remains a perfectly cooked, delicious egg with a slightly extra-savory aroma.
Local legend says that eating just one of these eggs will add seven years to your life! It’s a must-try for anyone looking for a bit of good luck (and a tasty snack).
I’ve visited Owakudani many times, and honestly, I buy these eggs every single time! They have a unique, addictive flavor that you just don’t get with regular boiled eggs. However, here are two important tips for your visit:
Ready to try the life-extending Black Eggs?
While the eggs are best eaten fresh and warm at the valley, you can also find black-egg-themed snacks and charms at the local souvenir shops. They are the perfect way to remember your “volcanic” adventure!
Our tour takes you straight to Owakudani via the scenic Hakone Ropeway.
