Sunpu Castle
In 1609 (Keichō 14), at the courtyard of Sunpu Castle, someone that looked like a blob of meat appeared. It had the form of a young child, and it had hands but no fingers, and it could even be called a "meat-person." It was thought that someone like this who'd enter a high security castle would obviously be a yōkai, but when they tried to capture it, it moved so fast, it could not be captured. Tokugawa Ieyasu, who lived at Sunpu Castle at the time, ordered that person be driven out, so the servants gave up trying to capture it and instead just drove it from the castle into the mountains.