Our neighbor to the south, Kagoshima, has a unique history: unlike other fiefs, which changed hands at the whim of the shogun (such as the handing of Higo to Kiyomasa and its subsequent transfer of Hosogawa), Kagoshima survived seven centuries under the Shimazu clan, from the 1180s through the 1870s. This is likely due to its remote location.
The Shimazu ancestoral home, called Sengan-en (仙巌園 - literally, hermatige rock garden), located adjacent to Kinko Wan, one of the largest caulderas in the world, is open to the public. We have recently become friends with its Website, which you can find here: https://www.senganen.jp/en/?fbclid=IwAR1AS33rQtQ9UAB1s2-Y1iEljUbQv-oSY3YoYnT2vsQJ78kYsTe5D9TFy34
A detailed description of Shimazu history is here: https://wiki.samurai-archives.com/index.php?title=Shimazu_clan - William