Rakuten's AI Model Sparks Open-Source Controversy

Japan's e-commerce giant Rakuten has stumbled into a public relations crisis with its latest artificial intelligence offering. The company's Rakuten AI 3.0 model, initially promoted as a homegrown achievement, is now at the center of an open-source licensing scandal that has developers buzzing.

The Discovery That Started It All

Tech enthusiasts digging through the model's code made an uncomfortable discovery: Rakuten had quietly removed the MIT Open Source License file from DeepSeek-V3, the Chinese AI model that served as its foundation. In the world of open-source software, this is equivalent to removing a copyright notice from a book you didn't write.

"It's not that they built on existing work - everyone does that," explains Tokyo-based developer Haruto Tanaka. "But pretending it's entirely yours? That crosses a line in our community."

Public Backlash and Quick Damage Control

The backlash came swiftly across Japanese tech forums and social media. Critics highlighted two major concerns:

• Legal questions: The MIT license explicitly requires maintaining original copyright notices
• Ethical concerns: Rakuten had accepted substantial government funding while presenting what appeared to be repackaged work

The company moved quickly to contain the fallout, adding a NOTICE file with proper attribution within days of the controversy emerging. Legally speaking, this patch-job brings them into compliance - but many in the open-source community remain unimpressed.

Bigger Questions Linger

Beyond the immediate licensing issue, this episode raises uncomfortable questions about corporate use of open-source projects:

• Should companies receiving public funds have stricter disclosure requirements?
• Where exactly should we draw the line between "building on" and "appropriating" community work?
• How can open-source principles survive as big money enters the AI space?

Rakuten has declined to explain why the license was removed initially. For now, their repaired GitHub repository tells one story while their initial actions tell another - and tech watchers are paying close attention to which version wins out in public perception.

Key Points:

• Rakuten AI 3.0 removed required license information from its base model
• Quick corrections followed public outcry from developer community
• Incident highlights tension between corporate and open-source cultures in AI development