Ancient Ocean Crossings Explained by Researchers’ Voyage Across East China Sea
June 25, 2025 – In a groundbreaking experiment, a team of researchers paddled a dugout canoe from Ushibi, Taiwan, to Japan’s Yonaguni Island, traversing the formidable Kuroshio current to shed light on the maritime capabilities of our Paleolithic ancestors. This journey spans approximately 140 miles and simulates how ancient humans, over 30,000 years ago, might have successfully crossed vast ocean expanses to reach remote Pacific Islands.
The voyage, which took over 45 hours, featured a crew of four men and one woman navigating the 25-foot-long canoe, named Sugime. The craft, crafted with primitive tools such as axes and adzes from a Japanese cedar tree, allowed the team to experience the challenges faced by early humans without modern technology. Despite enduring extreme fatigue, the crew completed the crossing safely, aided by escort crafts for safety.
Lead researcher Yousuke Kaifu from the University of Tokyo highlighted the significance of this experiment, stating, “Through the project, we learned the difficulties of crossing the ocean and gained a deep respect for our Paleolithic ancestors.” The crew navigated using celestial cues and ocean swells, mimicking the techniques of ancient mariners.
Previous attempts using bamboo and reed rafts had been unsuccessful due to their limitations against the strong ocean currents. This journey parallels the infamous 1947 Kon-Tiki expedition by Thor Heyerdahl, yet incorporates a wealth of archeological data to support the feasibility of such ancient crossings.
Additionally, a companion study simulated ocean conditions of 30,000 years ago, demonstrating that traversing the Kuroshio current was plausible, although unpredictable weather conditions could have led to peril during these ancient voyages. Researchers are optimistic that this study will enhance our understanding of human migration and resilience in prehistoric times.
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