On the daily report of 1/22/2019, Tepco briefly announced a Fukushima worker was confirmed to be dead on the previous day.

The report has only 2~3 lines, none of the details is revealed including the cause of death.

Even the press release does not mention this death. The daily reports of the following days entirely ignored this.

The report reads, in the afternoon of 1/21/2019, a Fukushima worker of a collaborating company fell unconscious. The worker was transported as emergency however he was confirmed to be dead during the day.

http://www.tepco.co.jp/press/report/2019/1512386_8985.html