Unidentified submarine shows up in Japan.

But how do they know it was a submarine? I think it may have been an Evangelion!

From Japan Times:

An unidentified foreign submarine temporarily entered Japanese territorial waters between Shikoku and Kyushu on Sunday morning, Defense Ministry officials said.

[...] "It was very regrettable," Defense Minister Yoshimasa Hayashi said. "We need to do our utmost tracking down the submarine and getting to the bottom of the incident."