The author of these two article have very "high confidence" in the Japanese SORYU class submarine.
Next to last paragraph in this article.
"A better idea would be to attack the Chinese fleet, particularly the 001A carrier, with Soryu diesel-electric submarines. The PLAN is notoriously weak in antisubmarine operations, and a submarine attack has the best chance of success." Next to last paragraph in this article.
http://nationalinterest.org/blog/the...te-naval-19599
http://nationalinterest.org/blog/the...-so-good-17898
Next to last paragraph in this article.
"A better idea would be to attack the Chinese fleet, particularly the 001A carrier, with Soryu diesel-electric submarines. The PLAN is notoriously weak in antisubmarine operations, and a submarine attack has the best chance of success." Next to last paragraph in this article.
http://nationalinterest.org/blog/the...te-naval-19599
http://nationalinterest.org/blog/the...-so-good-17898