Aircraft Discovered on the Seafloor of Lake Towada
In a groundbreaking survey conducted between July 12 and August 12, 2010, Windy Network’s Marine Research Division uncovered a submerged aircraft at the bottom of Lake Towada. This marked a significant discovery during a comprehensive seafloor mapping project of the lake, located in northern Japan.
Cutting-Edge Technology and Discovery
Using advanced sonar technology and the company’s proprietary software, 3D-GeoLet, the team generated a detailed 3D image of Lake Towada. Early in the survey, sonar data revealed the shape of a small airplane resting on the lakebed, leading to immediate follow-up investigations.
An underwater remotely operated vehicle (ROV) was deployed to the site, where researchers confirmed the discovery of a Japanese Army Type 1 twin-engine advanced trainer aircraft from World War II. This find was particularly poignant, as it occurred on August 15, just days before the 65th anniversary of Japan’s surrender at the end of the war.
Preservation in Pristine Condition
At a depth of around 45 meters, where the water temperature is approximately 4°C, the cold, nutrient-poor conditions of the lake prevented significant biological decay. The aircraft remained in nearly perfect condition, with minimal corrosion, an astonishing find considering its decades-long submersion. The markings of Japan’s national insignia, the Hinomaru, were still clearly visible on the tail section.
Press Coverage and Public Interest
A press conference was held on August 12, 2010, at the Technology Interface Center of Toyo Corporation to announce the discovery. The news was picked up by NHK, as well as major Japanese TV shows like Miyaneya and Super J Channel. The discovery generated considerable public interest due to its historical importance and the rarity of such well-preserved artifacts from World War II.
Successful Recovery Efforts
Two years later, on September 5, 2012, a collaborative effort between Windy Network, Seiyo Construction Company, and the Aomori Prefectural Misawa Aviation & Science Museum led to the successful recovery of the aircraft. After meticulous planning and a second recovery attempt, the plane was carefully raised from the lakebed and brought ashore, revealing the full extent of the aircraft’s size and condition.
Exhibition and Legacy
The recovered aircraft was later displayed at the Aomori Prefectural Misawa Aviation & Science Museum, with an opening exhibition in December 2012. This event attracted visitors and media attention alike, as the preserved aircraft became a symbol of both local and national history. Interviews with the discovery team and reports were featured in various magazines and publications, further cementing the significance of this historical recovery.
The discovery and subsequent recovery of the aircraft from Lake Towada is a testament to the enduring legacy of World War II and the importance of underwater archaeology in preserving history.
EN 
JA