I'm very dubious of news report comming from asian sources after the Carrier post and the SU-30 post. I don't know what the time stamp on that article is but none of the American newsmedia has picked up on it yet.
Oh, no that was a while ago. The sub ran aground near the Federated States of Micronesia, 350 miles south of Guam... which is a long long way from Japan.
Yeah there was a sub incident in San Francisco Bay recently I believe, but I haven't heard a single thing about any accidents in the greater Asian region.