Japan Police Accuse Man of Unauthorized Use of AI-Generated Image in Landmark Copyright Case; IGN, November 21, 2025

VERITY TOWNSEND, IGN ; Japan Police Accuse Man of Unauthorized Use of AI-Generated Image in Landmark Copyright Case

"Police in Japan have accused a man of unauthorized reproduction of an AI-generated image. This is believed to be the first ever legal case in Japan where an AI-generated image has been treated as a copyrighted work under the country’s Copyright Act.

According to the Yomiuri Shimbun and spotted by Dexerto, the case relates to an AI-generated image created using Stable Diffusion back in 2024 by a man in his 20s from Japan’s Chiba prefecture. This image was then allegedly reused without permission by a 27-year-old man (also from Chiba) for the cover of his commercially-available book. 

The original creator of the image told the Yomiuri Shimbun that he had used over 20,000 prompts to generate the final picture. The police allege that the creator had sufficient involvement in the AI image’s creation, and the matter has been referred to the Chiba District Public Prosecutors Office.

Japan’s Copyright Act defines a copyrighted work as a “creatively produced expression of thoughts or sentiments that falls within the literary, academic, artistic, or musical domain.” In regard to whether an AI-generated image can be copyrighted or not, the Agency of Cultural Affairs has stated that an AI image generated with no instructions or very basic instructions from a human is not a “creatively produced expression of thoughts or sentiments” and therefore not considered to meet the requirements to be copyrighted work.

However, if a person has used AI as a tool to creatively express thoughts or feelings, the AI-generated output might be considered a copyrighted work. This is to be decided on a case-by-case basis. The process behind the creation of the specific AI-generated image has to be looked at in order to determine whether it can be considered to be creative enough to be termed a copyrighted work. Key criteria are the amount of detailed prompts, the refining of instructions over repeated generation attempts, and creative selections or changes to outputs."

Japan’s largest newspaper, Yomiuri Shimbun, sues AI startup Perplexity for copyright violations; NiemanLab, August 11, 2025

ANDREW DECK  , NiemanLab; Japan’s largest newspaper, Yomiuri Shimbun, sues AI startup Perplexity for copyright violations

"The Yomiuri Shimbun, Japan’s largest newspaper by circulation, has sued the generative AI startup Perplexity for copyright infringement. The lawsuit, filed in Tokyo District Court on August 7, marks the first copyright challenge by a major Japanese news publisher against an AI company.

The filing claims that Perplexity accessed 119,467 articles on Yomiuri’s site between February and June of this year, based on an analysis of its company server logs. Yomiuri alleges the scraping has been used by Perplexity to reproduce the newspaper’s copyrighted articles in responses to user queries without authorization.

In particular, the suit claims Perplexity has violated its “right of reproduction” and its “right to transmit to the public,” two tenets of Japanese law that give copyright holders control over the copying and distribution of their work. The suit seeks nearly $15 million in damages and demands that Perplexity stop reproducing its articles...

Japan’s copyright law allows AI developers to train models on copyrighted material without permission. This leeway is a direct result of a 2018 amendment to Japan’s Copyright Act, meant to encourage AI developmentin the country’s tech sector. The law does not, however, allow for wholesale reproduction of those works, or for AI developers to distribute copies in a way that will “unreasonably prejudice the interests of the copyright owner."

Japan aims to lift intellectual property competitiveness via AI use; The Mainichi, June 3, 2025

 The Mainichi; Japan aims to lift intellectual property competitiveness via AI use

"The Japanese government said Tuesday it will seek to enhance the country's competitiveness in the area of intellectual property by promoting the use of artificial intelligence and attracting foreign talent.

In the intellectual property strategy for 2025, the country will take advantage of the international popularity of Japanese anime and the content of such movies that highlights local culture to help promote regional economies, expecting a total economic impact of around 1 trillion yen ($7.0 billion)."

Japanese media say AI search infringes copyright, urge legal reform; Kyodo News, July 17, 2024

 KYODO NEWS ; Japanese media say AI search infringes copyright, urge legal reform

"Artificial intelligence-powered search engines provided by U.S. tech giants like Google LLC and Microsoft Corp. likely infringe on copyright, an association run by Japanese mass media said Wednesday.

The Japan Newspaper Publishers and Editors Association, in a statement, called for companies operating such services to obtain consent from news organizations as search responses often resemble articles that are sourced without permission.

The association analyzed that AI search engines sometimes return inaccurate responses as they inappropriately reuse or modify articles and stressed that the companies should ensure the accuracy and reliability of their services before launch.

The association also urged the Japanese government to review and revise laws related to intellectual property, such as the copyright act, as a matter of urgency."

Japan's universities fail to make the most of intellectual property; Nikkei Asia, March 9, 2024

KENJIRO SUZUKI, Nikkei Asia; Japan's universities fail to make the most of intellectual property

"Due to lack of support, patents earn only 2% compared to U.S. schools"

Japan Declares AI Training Data Fair Game and ‘Will Not Enforce Copyright’; PetaPixel, June 5, 2023

 MATT GROWCOOT , PetaPixel; Japan Declares AI Training Data Fair Game and ‘Will Not Enforce Copyright’

"In the first such declaration of its kind, Japan has seemingly asserted that it will not enforce copyrights when it comes to training generative artificial intelligence (AI) programs.

Japan’s minister of education, culture, sports, science, and technology recently said that it is possible to take content from any source and use it for “information analysis.” 

According to a Japanese political website, Liberal Democrat minister Keiko Nagoaka clearly stated at a committee meeting that AI companies can use whatever data they want to train generative AI programs."

UN agency finds US, Asian companies seek most AI patents; Associated Press, January 31, 2019

Associated Press; UN agency finds US, Asian companies seek most AI patents

"The U.N.’s intellectual property organization says companies in Japan, South Korea and the U.S. are the top filers of patent applications involving artificial intelligence.

The World Intellectual Property Organization has issued a first report aiming to show trends in AI, seen as a growth area in coming years, although still a tiny fraction of all patent applications each year.

WIPO said Thursday that machine learning is the dominant AI technique disclosed in patents."

China keeps global crown in patent applications; Nikkei Asian Review, December 4, 2018

Rintaro Hosokawa, Nikkei Asian Review; China keeps global crown in patent applications

"China was responsible for around 40% of the 3.17 million patent applications submitted worldwide last year, putting the country at the top for the seventh straight year and driving Asia's growing presence in the global intellectual property arena.

The World Intellectual Property Organization said Monday China's 1.38 million applications mark a new record, though the group did not give a year-on-year percentage increase due to changes in the way China's patent office counted filings.

China's patent applications in 2017 mainly concerned electronic devices, computer technology and digital data transmission. Chinese tech companies, such as telecommunications equipment makers Huawei Technologies and ZTE, significantly boosted their application counts.

At 607,000, patent applications from the U.S. were less than half of China's total. That places America in second place, followed by Japan's 318,000 applications in third and South Korea's 200,000 in the No. 4 spot."

Brain Power Pays Off With Japan’s Intellectual Property Exports; Bloomberg, January 15, 2018

Connor Cislo, Bloomberg; Brain Power Pays Off With Japan’s Intellectual Property Exports

"Given the importance of IP to their economies, Japan and other advanced nations such as the U.S. are trying to strengthen protections in this area.

Japan nearly saw its preferred IP protection regime realized in the Trans-Pacific Partnership, until President Donald Trump’s decision to pull the U.S. out of the agreement threw the pact's future into doubt.

The remaining 11 TPP members have suspended multiple IP-related provisions from the original agreement. Meanwhile, another large trade deal championed by China, the Regional Comprehensive Economic Partnership, doesn’t address IP to the satisfaction of Japanese businesses."

Asia Is Getting Its Own Patent Police; Bloomberg, 7/7/16

Paul Einhorn and Pavel Alpeyev, Bloomberg; Asia Is Getting Its Own Patent Police:

"Xiaomi is among a growing number of Chinese companies—PC maker Lenovo, screen maker BOE, appliance maker Midea—“looking to get their hands on good, solid IP that can be used against multinationals,” says Guy Proulx, chief executive officer of advisory firm Transpacific IP Group. “Used against” often means extracting fees via angry letter, negotiation, or lawsuit. It’s a shift for Chinese companies, which have more often been the defendants in patent suits. They’re catching up with a trend in Japan and South Korea, where government-backed funds are fighting on behalf of big tech companies’ IP."