Inselberg

Japanese: Inselberg

…As the pediment expands, the mountain range shrinks until it finally resembles an island floating in the sea. This is called an Inselberg, which means an island mountain. As erosion progresses further, the Inselberg disappears and becomes a pediplain, a flat, vast terminal landform. …

From [Remnant Hill]

…Examples include Mt. Otake and Mt. Mitake in the Kanto Mountains, Mt. Otakine in the Abukuma Mountains, and Mt. Hayachine in the Kitakami Mountains. The isolated hills of bare rock found in the savannah regions of Africa are called Inselbergs in German (meaning "island mountains"), but similar hills are generally found on continental plateaus in arid regions and are considered to be a type of residual hill. Arid topography [Shiki Masahide]. …

From [Pediment]

...The synthetic alluvial fan in front of the mountain is also called Bajada. As the pediment expands, the mountain becomes an isolated hill called an Inselberg (German). When the Inselberg disappears, it becomes a vast, flat terminal landform called a pediplain.

*Some of the terminology that mentions "Inselberg" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…ペディメントが拡大するとともに山地は縮小してついに海上に浮かぶ島のようになる。これは〈島山〉を意味するインゼルベルクInselbergと呼ばれる。さらに浸食がすすむとインゼルベルクも消滅し平たんで広大な終末地形であるペディプレーンpediplainとなる。…

【残丘】より

…関東山地の大岳山，御岳山，阿武隈山地の大滝根山，北上山地の早池峰（はやちね）山などがその例である。アフリカのサバンナ地域にみられる裸岩の孤立丘はドイツ語でインゼルベルクInselberg(〈島山〉の意)と呼ばれるが，これと同種のものは一般に乾燥地の大陸台地の中にみられ，一種の残丘と考えられる。乾燥地形【式正英】。…