Field test in Kyoto, Japan. (IMAGE) University of Tokyo Caption The type of Welsh onions used in the experiment were a variety called Kujo negi. These onions are a traditional vegetable of the Kyoto region and a staple part of local cooking. Credit 2024 Tokumaru et al./Scientific Reports Usage Restrictions Credit must be given to the creator. License CC BY Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.