In the early 1970s, DENSO began researching and developing the QR Code to computerize the "Kanban" system at the Toyota production sites. Overcoming numerous technical barriers and protests from the worksite, they completed the QR Code in 1994.
After that, the development of the QR Code proceeded with a succession of changes in leadership, including peripheral technologies, international standardization efforts, open-source development, and the development of the field of use.
In the 2000s, users began to find new applications for the QR Code, and its use exploded with its adoption by 7-Eleven, cell phones, All Nippon Airways, bank ATMs, and platform doors at train stations.
It has numerous advantages over other codes, including an overwhelming 350 times more significant volume of information than barcodes, faster-reading speed (Quick Response) and error avoidance, higher security, a smaller area, and greater design freedom. It is also available in many languages and is now used as the primary means of electronic payment in China.
Based on interviews with the people involved, this book deciphers the story of the QR Code up to the present day. The book also describes the QR Code as a rare example of innovation from Japan, which simultaneously implemented the Toyota Production System, scrum-based development, ambidextrous management, user innovation, and more.