Japanese mobile Internet service provider subsidiary of Sony, So-net Entertainment, has reported incidents of security breaches in its systems.

So-net, which is about 58% owned by Sony and a Sony financial unit, said that hackers had accessed user accounts and used "So-net points" from 128 accounts, with which they obtained goods worth about $1,225. Another 73 accounts were also compromised, but the points were not redeemed. The hacker also accessed the e-mail accounts of 90 users.

The company said that it discovered the breach on Wednesday after customer complaints. It immediately blocked the Internet Protocol address behind the 10,000 attempts to break into the system.

The company has said that it is unlikely that the same hackers behind the Sony PSN attack were responsible for this one because the method of intrusion used was different.

So-net Entertainment spokesman Keisuke Watabe said, "Although we can’t completely rule out the possibility that there is a connection with the PSN issue, the likelihood is low."

It was in last week that Sony restored its PSN network for users after shutting it down for over a month. Sony’s PSN and some other networks were subject to a massive hack in April, which is believed to have compromised around 100 million users worldwide.