A Japanese television reporter died in 2013 after working 159 hours of overtime in one month and had only two days off in that same period, it was revealed this week.

The Japan Times reported that it was determined Miwa Sado died at age 31 of congestive heart failure after working an extremely long month leading up to Japan's Tokyo Metropolitan Assembly election and the House of Councilors election.

Sado covered the Tokyo Metropolitan Government for news outlet NHK.

Masahiko Yamauchi of NHK's News Department told the Japan Times the incident is a "problem for our organization as a whole, including the labor system and how elections are covered."

The Daily Beast reported earlier this year on the culture of working too much in Japan, which led to 93 workers committing suicide in 2015.

The Daily Beast claimed that workers are technically only supposed to put in either eight hours a day or up to 40 hours a week on the job, but a culture of working hard to earn promotions and better jobs at other companies dominates.

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