Unless someone can read something else here, I'm going with the fact that Nana Iwasaka is still the captain of Hisamitsu (not Fumika Moriya, as the V.League site suggests. The Hisamitsu site is speechless).
They interviewed her (along with Saori Takehashi, Toyota's Captain) before the match. I've seen this before as well. Iwasaka is the Captain.