Rakuten fixes issues twice as fast with Codex
Rakuten announced that it has integrated OpenAI’s Codex into its development pipeline, cutting mean time to recovery by 50% and shortening full‑stack build cycles to weeks. The change was unveiled during the company’s Q2 earnings call on March 5, 2026.
The Japanese e‑commerce giant has struggled with slow release cycles amid rising competition from Amazon Japan and domestic startups. Prior to Codex, Rakuten’s CI/CD reviews required manual code inspections that delayed production deployments.
By automating code review and building with Codex, Rakuten gains a competitive edge in speed and quality. The 50% MTTR reduction signals that generative AI can materially improve software reliability, a trend that could pressure other large retailers to adopt similar tooling. However, the approach also raises concerns about model bias and the need for human oversight in critical code paths.
Rakuten’s engineering teams and its partner ecosystem are directly affected, with faster releases enabling quicker feature rollouts. Observers should watch how the company’s adoption influences other Japanese e‑commerce players and whether similar AI‑driven pipelines become industry standard.
- Rakuten cuts MTTR by 50% using OpenAI Codex
- Full‑stack builds now complete in weeks, not months
- Other retailers may follow suit, raising AI adoption in CI/CD