Japanese 15-year-olds spend an average of 2.3 hours browsing social media during their weekday free time, the shortest amount among 24 countries surveyed, according to data from the Organization for Economic Cooperation and Development. (News On Japan)

Tokyo stocks fell sharply on September 8, with the Nikkei 225 closing at 65,269, down 1,130.51 points, or 1.70%, as a sudden surge in the yen hit exporters and forced investors to reassess the impact of faster Bank of Japan tightening on corporate earnings, equity valuations and the broader economy. (News On Japan)

The yen strengthened to around 152 against the dollar on September 8, reaching its strongest level in about six months after gaining nearly 7 yen in roughly a week as investors focused on prospects for a narrowing interest-rate gap between Japan and the United States. (News On Japan)

Japan's inflation-adjusted real wages rose 2.4% in July from a year earlier, marking a seventh consecutive monthly increase as higher base salaries and easing price pressures improved workers' purchasing power. (News On Japan)

Tokyo police detained 39 minors during a two-day nighttime operation around the "Toyoko" area of Kabukicho in Shinjuku, with 17 of them, or roughly 40%, found to have previously overdosed on medication. (News On Japan)

The first hearing in a lawsuit seeking the return of 279 sets of Ainu ancestral remains from the Japanese government was held on September 4, marking the first time an Ainu group has taken the state to court over the return of human remains. (News On Japan)

Renovation work has begun at a hospital in Izumisano, Osaka Prefecture, as the city prepares to introduce a baby hatch for parents unable to raise their children and a confidential birth system that allows pregnant women to give birth without publicly disclosing their identities. (News On Japan)

A school-based torch relay for the Asian Games began in Aichi Prefecture on September 7, with students and other runners set to carry the flame through 14 schools before it reaches the main venue on September 16. (News On Japan)

Japanese companies are moving closer to commercializing photonics-electronics convergence technology that replaces part of conventional electrical data transmission with optical signals, potentially allowing huge volumes of data to move with lower latency while sharply reducing power consumption as artificial intelligence drives rapid growth in electricity demand from data centers. (News On Japan)

Rakuten Mobile faces a new test of its network quality after KDDI decided to scale back roaming support from September 2026, ending access to its network in areas where Rakuten already has its own base stations while continuing service in mountainous and sparsely populated regions. (News On Japan)

A 58-year-old man has been arrested on suspicion of setting fire to a home in Tokyo's Adachi Ward on September 4, injuring an 81-year-old woman, as police investigate whether he was involved in six suspicious fires reported in the area over about two weeks. (News On Japan)

Japanese homebuyers are facing growing uncertainty as mortgage costs rise alongside a sharp increase in interest rates, with the yield on the benchmark 10-year government bond briefly topping 3% last week for the first time in about 30 years. (News On Japan)

Prime Minister Sanae Takaichi is accelerating preparations for a Cabinet reshuffle that could take place as early as next week, considering ministerial posts for senior Liberal Democratic Party officials while weighing the treatment of Internal Affairs Minister Yoshimasa Hayashi and a new Cabinet member from the Japan Innovation Party. (News On Japan)

Japan's foreign exchange reserves fell by a record amount in August, reflecting the impact of currency market intervention by the government and the Bank of Japan at the end of July, the Finance Ministry said on September 7. (News On Japan)

Yokohama Mayor Takeharu Yamanaka resigned on September 7 after the city assembly unanimously approved his request to step down over allegations of workplace power harassment, setting the stage for a mayoral election in October. (News On Japan)

A woman in her 60s died after her car was submerged in a flooded underpass in Iwaki, Fukushima Prefecture, as record rainfall caused widespread flooding, landslides and transport disruption across Kanto and surrounding areas on September 7, with authorities warning that further rain was expected during the evening commute. (News On Japan)

Three people died and two others were injured in a suspected arson and stabbing at a cake shop in Motosu, Gifu Prefecture, where the 66-year-old female owner had gathered with nine former junior high school classmates on September 5, with police investigating whether a 70-year-old company executive who was apparently not invited to the gathering was involved. (News On Japan)

Tokyo stocks rose sharply on September 7, with the Nikkei 225 closing at 66,399, up 1,378 points, or 2.12%, as buying in artificial intelligence and semiconductor-related shares lifted the headline index, even though more stocks fell than rose across the Prime Market. (News On Japan)

A new generation of optoelectronic integration technology developed over four decades by Japanese companies is moving closer to commercialization, offering a way to transmit huge volumes of data with low latency while sharply reducing the electricity consumed by data centers as artificial intelligence drives explosive growth in computing demand. (News On Japan)

Dyson CameraJet™ turns the smart toothbrush into an active sensing product, making useful feedback and clear privacy design part of the same engineering brief. (News On Japan)