Seriously, it was only 4.5 million emails. It could have been worse since, after all, another 5 million emails were temporarily unavailable.
The Kyodo news agency said the company confirmed Friday that 4,492,200 e-mails sent to nearly 275,000 people were lost and another 5,149,500 were temporarily unavailable to users.
The company said most of the erased online messages were from specific Internet addresses and had been sent in bulk between Dec. 26 and Feb. 26. Source: UPI
So they were bulk emails, but not spam, according to the story. At least they weren’t individual emails. Most likely these were not that important.
On the other hand, maybe this is how they plan to get unlimited email storage to work. 
