Old man mumble

　The sweet potato was introduced to Satsuma Province (present-day Kagoshima Prefecture) via the Ryukyu Kingdom (present-day Okinawa Prefecture) during the Edo period, and it became widely cultivated there. The name "satsumaimo" (sweet potato in Japanese) literally means "potato that spread nationwide from the Satsuma domain." Another name for it is "kansho," which is also its Chinese botanical name and means "sweet-tasting potato."

　Sweet potatoes are not grown from seeds. Instead, they are propagated by sprouting them to create seedlings, which are then planted in fields. While the initial process of creating seedlings requires some effort, once planted, sweet potatoes grow relatively unattended until harvest. They are not prone to continuous cropping problems and are easy to cultivate. However, in overly fertile fields with high nitrogen content, the vines tend to grow excessively, hindering tuber development – a condition known as "vine growth without tuber formation." Therefore, it's important to adjust fertilizer use and keep it minimal.　— From Wikipedia ー --Gemini--