News On Japan

90-million-year-old tooth unearthed in Kyushu, may provide clues on mammal evolution in Asia

Aug 25 (Japan Times) - A fossilized tooth of an extinct mammal thought to be a close relative of marsupials has been unearthed in central Kyushu, a find that dates back about 90 million years and may provide clues to how mammals evolved in Asia, the Mifune Dinosaur Museum said Thursday.

The tooth, the first of its kind excavated in Japan, was uncovered from sandstone in the Tashiro district in Mifune, Kumamoto Prefecture. The stone was found in March 2014 from a geological layer formed in the late Cretaceous period, according to the museum.

The uncovered tooth measures about 2 mm in length and 3 mm in width. Based on the shape and size, it is assumed to be a back tooth from the upper left jaw of a carnivore that was about 10 to 15 cm tall.

The fossil is believed to be of an animal similar to a Deltatheridium, an ancient relative of marsupials that lived in Mongolia in the Cretaceous period about 145 million to 66 million years ago.

Marsupials - a subclass of mammals that today include kangaroos and koalas - and Deltatheridiums are classified in the metatheria group. In Asia, some metatheria fossils have been discovered in a geological layer of the late Cretaceous period in inland areas of Mongolia and China.

News On Japan
POPULAR NEWS

A passenger car was captured speeding across the frame from left to right by a security camera just moments before a fatal crash in Iida City, Nagano Prefecture, that claimed the lives of four vocational school students.

A fire broke out on the evening of April 25th on an electronic billboard attached to the Yodobashi Camera commercial complex in front of JR Osaka Station, prompting a large emergency response. No injuries were reported.

Organic fluorine compounds known as PFAS—suspected to be harmful to human health—have been detected at concentrations exceeding the national provisional target in rivers and groundwater at 242 sites across 22 prefectures, according to a government survey.

The Japanese government will begin issuing blue tickets for bicycle traffic violations in April 2026, with fines including 5,000 yen for ignoring stop signs and up to 12,000 yen for riding while using a smartphone.

A 26-year-old woman was arrested in the early hours of April 24th in Kasuya Town, Fukuoka Prefecture, on suspicion of driving under the influence of alcohol. While admitting to the offense, she claimed, "I ate chocolate that contained alcohol."

MEDIA CHANNELS
         

MORE Society NEWS

After 77 years, Tokyo is set to return blue skies to Nihonbashi as the city buries its expressways underground and reimagines its historic heart.

The Emperor and Empress attended the Greenery Ceremony, an annual event honoring researchers who have made outstanding contributions in fields such as plant and forest conservation.

Nearly three months after a road collapse in Yashio City, Saitama Prefecture, authorities are preparing to resume the search for the missing truck driver as early as next week.

The Japanese government will begin issuing blue tickets for bicycle traffic violations in April 2026, with fines including 5,000 yen for ignoring stop signs and up to 12,000 yen for riding while using a smartphone.

A woman’s body discovered in a freezer at a residence in Nagahama, Shiga Prefecture, is now believed to have been concealed there for approximately four and a half years, police announced.

A 26-year-old woman was arrested in the early hours of April 24th in Kasuya Town, Fukuoka Prefecture, on suspicion of driving under the influence of alcohol. While admitting to the offense, she claimed, "I ate chocolate that contained alcohol."

A man who was charged with committing an act of abuse against his young daughter and distributing a video of the incident through a private social media group admitted to the allegations during his first court appearance.

A monkey walking upright on two legs was spotted in a residential area of Tokyo on April 23rd, drawing attention as it crossed a street in the rain before entering a nearby field and munching on crops.