Angola paid about ¥17 million to a Japanese subcontractor it never owed. Osaka's Expo hosts say they have no legal basis to pay. Behind the gap: a law that stops at wages and a relief bill that lapsed.

Behind Umitamago aquarium in Oita, a hose dispenses 120 liters of filtered seawater for 100 yen. Izakayas and home aquarists buy it, and one restaurant's remark kept the machine alive.

Japan's earthquake alert announced a magnitude 9.9 for Hokkaido to central Japan. The real quake was an M6.9 near Kamchatka, a safeguard added in 2020 wasn't working, and Docomo phones never got the alert at all.

A butterfly wing kept in a 100-yen insect fossil museum in Hyogo is the oldest known fossil of a living species. It is not the oldest butterfly, and the same room has yielded three finds in about 18 months.

TOK has finished a 23-billion-yen photoresist building in Koriyama. Its 2023 and 2026 releases mention neither AI nor capacity; its earnings documents show how demand and the start date shifted in between.

Nikkei says NTT Data is in final talks on an Osaka data centre for Anthropic of up to 500 MW. Neither company has commented. Grid power will likely be slow, and a local site would not by itself keep data in Japan.

The IMF projects Japan will fall to sixth by nominal GDP in 2027, behind India and Britain, yet the gap to Britain is roughly 0.5%. The weak yen explains the ranking; it does not explain Japan's slow real growth.

Ammonia burns slowly and needs about 500 times more ignition energy than iso-octane. Daihatsu turns part of it into hydrogen on the car. Why it starts with kei cars, and which problems it still lists as open.

A Moon clock gains about 56 microseconds a day on Earth clocks, about 17 km of navigation error per day if uncorrected. The CGPM's lunar time draft seeks one reference scale and never mentions optical clocks.