Mine, Yamaguchi

The city was founded on March 31, 1954 by a merger of municipalities that departed from Mine District (Mine-gun). On March 21, 2008, Mine absorbed the rest of Mine District, which consisted of towns Mitō and Shūhō, while the newly merged city retained the name, Mine.

Per Japanese census data, the population of Mine in 2020 is 23,247 people.[3] Mine has been conducting censuses since 1920.

Akiyoshi-do cave

• Akiyoshidai Quasi-National Park, which includes the Akiyoshidai (秋吉台, Akiyoshi plateau) and Japan's longest cave, the Akiyoshido (秋芳洞), the latter of which is designated a Special Natural Monument. Akiyoshidai is served by a natural history museum, visitor center, rest house, youth hostel and park headquarters building, and is traversed by a scenic roadway and several walking trails. Events include a fireworks festival in July, a “Karst Walk” in November, and an annual burning off of dry grasses in February called “Yamayaki”. Akiyoshidai Quasi-National Park is situated within the Mine-Akiyoshidai Karst Plateau Geopark.
• Akiyoshido, Akiyoshido (秋芳洞). Towards the southern end of Akiyoshidai is the Akiyoshido cave, named by Emperor Hirohito on May 30, 1926 when he was still crown prince. This spacious cave is up to 100 meters wide and has 8.79 kilometers of passages, making it the longest in Japan and one of the longest in Asia. At the present time an approximately one-kilometer-long section of the cave is open to the public as a sightseeing course, with a walkway and bridge system, entering at the cave's lowest point and exiting via an artificial elevator. This portion of the cave is also well decorated with a variety of large and colorful speleothems.
• Mine-Akiyoshidai Karst Plateau Geopark

Stalactite called "Gold Column"

The plateau consists of uplifted reef limestones of Paleozoic age, which were thickened by overfolding during the Akiyoshidai orogenic movement. Subsequent erosion has created an undulating karst landscape dimpled with many dolines and countless limestone pinnacles up to two meters in height. Beneath the surface lie hundreds of caves, a few of them quite significant geologically.

Numerous fossils of Pleistocene age have been found in these caves, including those of the Japanese rhinoceros, Stegodont elephant, Naumann elephant, Young tiger, and numerous other animals from the last interglacial period.

The area around Akiyoshidai was once heavily forested about 500,000 years ago. In the Jōmon period, the area served as a hunting ground and the bottoms of sinkholes as vegetable fields. Numerous Paleolithic artifacts have been recovered. As farming began in Japan, the local people eventually replaced the forested landscape with Japanese pampas grass for feeding their animals and thatching houses. Repeated cycles of burning the grass have kept trees from growing back since.

• Sekinari Nii, former governor of Yamaguchi Prefecture
• Mayu Iwatani, acclaimed professional wrestler with World Wonder Ring Stardom and Ring of Honor
• Kazuaki Okazaki, executed convicted murderer and former member of Aum Shinrikyo (Sakamoto family murder and Tokyo subway sarin attack)

• Media related to Mine, Yamaguchi at Wikimedia Commons
• Mine City official website (in Japanese)
• Yamaguchi Prefecture official website (in English)