The IAEA has released a report on the Fukushima accident, which is accompanied by the release of five technical volumes containing analysis about the accident from international experts.
Find a copy of the report & technical volumes at: https://www.iaea.org/newscenter/news/iaea-releases-director-general%E2%80%99s-report-fukushima-daiichi-accident
The report and volumes are available in Arabic, Chinese, French, Russian, and Spanish. A full Japanese translation will become available in late September.