Sekahan

Sekahan

Editor of Sekahan, a Japanese news-analysis blog. Writes English explainers built on Japanese-language primary sources such as Teikoku Databank reports, government white papers, and official statistics.

Saint Seiya Creator Masami Kurumada Sues Over ¥4.6 Billion Missing From His Companies. Who Manages a Manga IP That Outgrew Its Author?

Masami Kurumada, the creator of Saint Seiya, and three of his companies filed suit at the Tokyo District Court on September 2, 2026, alleging that about 4.686 billion yen, roughly 30 million dollars, flowed out to a former manager and associates over six years. According to the plaintiffs, the losses were found not by an internal check but by a tax inquiry. This article explains how manga rights are normally routed through publishers in Japan, why the author-owned model gave one person both the money and the information, and adds Japanese Reactions from X. No court has ruled on any of the allegations.

A Japanese YouTuber Said He Would Not Let Fukushima University Touch Radiation Research. Can Entrance Exam Scores Measure a University’s Research? Japanese Reactions

The Japanese YouTube channel wakatte.TV, which built 770,000 subscribers on mocking universities by entrance exam difficulty, said of radiation research that it would not want Fukushima University touching it. The university's president issued a statement on September 1, 2026 and the channel deleted the video and apologised. This article explains what hensachi actually measures, who staffs the university's radiation research institute, how Japanese law decides which institutions may handle radioactive material, and adds Japanese Reactions from X, where two sitting mayors drove the response.

Why Shein Listed in Hong Kong at a Quarter of Its Peak Valuation, and How Japan Reacted

Shein listed in Hong Kong on September 1, 2026 at a market capitalisation of about $26.5 billion, roughly a quarter of the $98.2 billion it was assigned in a 2022 private round. This article explains why the company listed anyway, what the de minimis rule changes in the United States, the EU, France and now Japan did to its model, and adds Japanese Reactions from X, where the conversation fixed almost entirely on the size of the fall.

Messi Retires From Argentina After 21 Years, 207 Caps and 125 Goals | Japanese Reactions to the End of an Era

Lionel Messi announced his retirement from the Argentina national team on August 31, 2026, closing a 21-year career of 207 caps and 125 goals. In 2016, at 29, he had already quit once, written off as a player who could not win for his country. This article traces how the verdict was rewritten in his final five years, and adds Japanese reactions from X, where the debate settled on timing rather than legacy.

An AI Model Found Decades-Old Errors in a Chemistry Reference Database | Japanese Reactions to AI Auditing Science

Nature reported on August 6, 2026 that a machine-learning model predicting boiling points had exposed long-standing errors in a chemistry reference database. The same technology is also injecting fabricated citations into the literature. This article traces both directions, and adds Japanese reactions from X, where the debate has moved from whether to use AI to who verifies it and who is accountable.

Nepal-Tibet Flood: The Mountain Itself Collapsed, Not a Glacial Lake, With Japanese Reactions

A wall of ice and rock broke off Langtang Lirung on August 26, 2026, and travelled roughly 100 kilometres down the Nepal-Tibet border valley, killing at least 469 people on the Nepali side. The seismic signal first reported as a magnitude 4.4 earthquake turned out to be the collapse itself. This was not a glacial lake outburst flood, and the difference matters for whether anyone could have been warned.

A Chinese Robot Ran 100m in 8.64 Seconds. The Real Threshold Is the Day It Works Cheaper Than a Human, With Japanese Reactions

A humanoid robot called Tiangong Ultra won the 100-metre final in 8.64 seconds in Beijing on August 26, 2026, beating Usain Bolt's world record on the clock. A day earlier it had failed to stop after its semi-final run and caught fire. The threshold that actually matters is not human-like movement but the day a robot works cheaper than a hired worker, and Japanese reactions to the games show a country watching its own former lead from the stands.

Japan’s Health Ministry Cancelled a Movie Tie-Up in Five Days. What It Was Actually Trying to Deliver, With Japanese Reactions

Japan's Ministry of Health, Labour and Welfare cancelled a tie-up with the film Mama ga Mou Kono Sekai ni Inakutemo five days after announcing it, and is recalling posters sent to cancer hospitals. What the ministry was actually trying to promote, why the same words changed meaning on a hospital wall, and Japanese reactions on X.