Sokuten-class auxiliary minelayer (1913)
The was a class of minelayers of the Imperial Japanese Navy (IJN), serving during the 1910s and World War II. They were called the Sokuten" class from their nameship. And, they were called Toshima" class after the "Sokuten" retired. Also, by the book, the "Natsushima" was included to this class. This article handles the "Natsushima" and "Sokuten" class collectively, because they do not have a big difference. Their official class name was not mentioned in the IJN official documents.