Japan's railway system is well-known globally for its punctuality, but a recently released transport ministry report points to frequent delays during Tokyo's rush hour.

The Railway Bureau of the Land, Infrastructure, Transport and Tourism Ministry published a report on Dec. 22 about train delays in Tokyo. The report came in response to recommended improvements to the railway network published by the Council of Transport Policy.

The report — the first of its kind by the ministry — provides statistics on the frequency of delays, a breakdown of the causes and countermeasures adopted by each train company.