I don't know much Japanese but what i can make out is that she's saying something chestnuts, and something about some navy battle?
No no no, this is from a campaign joined by a sweets shop and several artists. The artists gives designs of kancolle-related sweets, and that sweets shop produce and sell them. And what Hisahiko designed is the floating-fortess shaped filled mochi as shown on the pic above, held in the hands of Hoppo-chan.
You can find more about the products of this campaign here