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# Masahiro Hara: The Engineer Who Built a Bridge Between Two Worlds
- URL: https://www.unsung-stories.com/masahiro-hara-the-engineer-who-built-a-bridge-between-two-worlds/
- Published: 2026-09-20T10:17:00.000Z
- Updated: 2026-09-20T17:13:05.000Z
- Author: Richard Sedley

In the early 1990s, workers in Japanese car factories could spend most of their day scanning barcodes instead of building cars. Modern production depended on tracking thousands of parts, and even a single component required multiple barcodes to carry all the information it needed.

The process was repetitive, slow and vulnerable to mistakes. A little dirt or grease could make a barcode unreadable and bring a production line to a standstill. Even minor delays could ripple through the whole factory, driving up costs, holding up orders, and putting production targets at risk.

The problem had become impossible to ignore.

The task of solving the barcode problem fell to Masahiro Hara, an engineer at the major Japanese automotive supplier Denso. Hara had joined the company in 1980 after studying electrical engineering. He was now asked to solve a problem that was costing factories time and money.

Hara spent days watching the production line before he began designing a new kind of code. It had to store far more information than a barcode, scan almost instantly from any angle, and still work if part of it was covered by dirt, grease or scratches.

His solution was the Quick Response code. The QR code.

His experiments showed that squares placed in three of the four corners let the code be recognised instantly, even from different angles. Hara’s team analysed thousands of images to find a pattern that rarely appeared in the natural world, ensuring the corner markers would stand out. Replacing a single row of bars with a two-dimensional grid of tiny squares also dramatically increased how much information the code could hold.

By 1994, Hara’s work was complete. Information that once required as many as ten barcodes could now fit into one code. It could be scanned quickly from almost any angle and still be read even when partly obscured by dirt or damage. Production became faster and more reliable. That could have been the end of the story.

Instead, it marked the beginning of another. Denso chose not to enforce the patent rights for the standard QR code. That decision allowed other companies to adopt and build upon Hara’s invention without paying licence fees, helping it become a global technology.

Then smartphones put QR codes into everyone’s pocket. In China, QR codes became central to everyday life, allowing millions of people to pay for everything from groceries to bus fares with a quick scan. During the COVID-19 pandemic, governments around the world used them for venue check-ins, introducing the technology to millions more.

Hara had created much more than a better barcode. A restaurant menu could become an invitation to the story of each dish, its ingredients, allergens and suggested wine pairings. A museum label could reveal an object’s history or provide access to an archive. An electrical product could provide instructions, demonstrations or proof of authenticity.

The QR code itself was never the destination. It became one link in the chain connecting physical objects with digital information, services and experiences.

Masahiro Hara wanted to stop factory workers from wasting their days scanning barcodes. In solving that problem, Hara quietly built one of the first practical bridges between the physical and digital worlds.

*Suggested by* [*Kevin McCullagh*](https://plan.bz/team/kevin-mccullagh/?ref=unsung-stories.com)

### Further reading

[*Development and Popularization of QR Code: Code Development Pursuing Reading Performance and Market Forming by Open Strategy*](https://www.aist.go.jp/pdf/aist%5Fe/synthesiology%5Fe/vol12%5Fno1/vol12%5F01%5Fp19%5Fp28.pdf?ref=unsung-stories.com) by Masahiro Hara

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