Tokyo Electric Power Co (TEPCO) said Friday 460 employees sought voluntary retirement in fiscal 2011, which ended on March 31.

The number was 3.5 times higher than the usual number, TBS reported. In March alone, more than 100 employees took voluntary retirement, officials said at a news conference.

The main reason given for the increasing number by employees were threats and bullying of their families by people angry at TEPCO's response to the Fukushima Daiichi nuclear crisis following last year's tsunami. The second most common reason was a sense of despair over their business future, TBS reported.

Analysts say morale is low at the utility with current employees becoming increasingly concerned about the company's ability to secure a stable supply of personnel.

TEPCO announced this week it was cutting executives' annual income by 25% and everyone else's salaries by 20%. It also said it would not be paying any bonuses this year.

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