Five years have passed since Japan’s flagship supercomputer Fugaku, based in Kobe, began full-scale operations, achieving a series of breakthroughs by simulating complex phenomena on a massive and highly precise scale, ranging from the formation of galaxies to the behavior of nerve cells. (News On Japan)

Deep winter conditions persist into April at Sukayu Onsen in Aomori Prefecture, with 8-meter snow walls still standing, while the facility’s main attraction, the expansive wooden bathhouse known as the "Hiba Sennin-buro," a rare mixed-gender bathing area, continues to draw visitors. (News On Japan)

Chief Cabinet Secretary Yoshimasa Kihara said during a press conference that one Japanese national detained in Iran in January 2026 has been released on bail. (News On Japan)

Japan’s long-term interest rates climbed to their highest level in roughly 27 years on April 7th, as concerns over rising inflation triggered a broad sell-off in government bonds. (News On Japan)

A trial luggage storage service has begun at a bank in Kyoto, as part of efforts to address the growing number of tourists visiting the city. (News On Japan)

Tokyo’s Ogouchi Dam, a key water source for the capital, has fallen to its lowest level since the Heisei era, raising concerns over potential water shortages as rising temperatures intensify pressure on supply. (News On Japan)

Rising tensions in the Middle East are raising concerns over potential disruptions to medical supplies in Japan, particularly due to uncertainty surrounding naphtha used in products such as gloves and gowns, with hospitals warning that a halt in supply could significantly impact medical care while authorities move to reassure that stockpiles are sufficient for the time being. (News On Japan)

A third vessel linked to Japan has been confirmed to have passed through the Strait of Hormuz, where a de facto blockade remains in place following heightened tensions in the region. (News On Japan)

A 31-year-old Polish man was rescued by helicopter after falling near the New Seventh Station of Mount Fuji at around 11 a.m. on April 6th during an off-season solo climb, after calling emergency services to report that he believed he had broken his leg. (News On Japan)

A man in his 60s was arrested in the act after allegedly threatening a route bus driver with a knife while the vehicle was in motion in Tokyo’s Nakano Ward on April 7th. (News On Japan)

U.S. President Donald Trump expressed dissatisfaction with Japan over its response to a military operation involving Iran, stating that Japan "did not help" during the campaign. (News On Japan)

Prime Minister Sanae Takaichi said on April 6th that Japan is making arrangements for separate high-level talks with Iran in response to the worsening situation in the Middle East, as a deadline for negotiations set by U.S. President Donald Trump approaches. (News On Japan)

Kyoto Governor Takatoshi Nishiwaki won a third term after defeating two first-time challengers in the prefectural election held on April 5th, securing more than half of the total votes cast with backing from the Liberal Democratic Party, Komeito, the Constitutional Democratic Party, the Democratic Party for the People, and other centrist groups. (News On Japan)

A survey of industry participants indicates that rice prices are expected to decline over the next three months, reflecting a continued bearish outlook across the sector. (News On Japan)

An extensive deep-sea investigation has revealed new details about the final moments of the Tsushima Maru, a wartime evacuation ship that sank during World War II, uncovering two critical points of damage that led to its rapid sinking in just 10 minutes. (News On Japan)

The Japanese government has established a plan to secure sufficient oil through early next year by utilizing alternative routes and procurement methods, as the effective closure of the Strait of Hormuz continues to disrupt global energy flows, prompting full-scale efforts from May to secure alternative sources of crude oil. (News On Japan)

A bus carrying riot police from Nara overturned on the Joban Expressway around noon on April 5th in Ibaraki Prefecture while en route to Fukushima to provide security for an upcoming visit by the Emperor and Empress, leaving one officer with minor injuries. (News On Japan)

As the Iran conflict shows signs of prolonged escalation, Japan’s heavy reliance on Middle Eastern oil is driving a sharp surge in naphtha prices—an essential raw material for plastics—forcing manufacturers to implement unprecedented price hikes of over 30% while raising concerns that widespread cost increases and potential shortages across food packaging, medical supplies, and daily goods could intensify from May onward if supply disruptions persist. (News On Japan)

Commercial whaling for the season has opened, with two minke whales landed at Nemuro Port in Hokkaido, as the Sea of Okhotsk season began on April 1st with two small vessels from fishing cooperatives in Wakayama and Chiba prefectures each landing one whale. (News On Japan)

Toyota Motor has begun selling two vehicle models manufactured at its U.S. plants in Japan, marking a shift toward so-called "reverse imports" as part of efforts to improve trade relations between Japan and the United States. (News On Japan)