Abe has some of Japan's neighbours nervous over his support for expanding Japan's already formidable military and eliminating some of the 'self defence' restrictions in place since WWII. Recent tensions between Japan and China over the disputed Senkaku islands are another concern, one Abe did nothing to ease by his remarks at Davos.
International affairs boffin Ian Bremmer and a suspiciously large contingent of think-tank poobahs were primed to love the speech (the text of which was, by Davos practice, not made available to the common herd), and they did.
And Prime Minister Abe just came, he gave a great speech. Folks are optimistic about the economy. The one part of the speech that people were really concerned about was Japan-China. And understandably. He's criticizing the Chinese as being aggressive and militaristic. He compared Japan-China relations explicitly to relations between Germany and the UK in 1914, where the economic relations were good but the security tensions, let's say, were not so good. And we saw what happened there.
I wouldn't say that Abe was directly raising the specter of war, but he was saying that China is acting in a manner that's unacceptable and Japan won't tolerate it.