And the plot thickens.

I can't say this helps me grasp the meaning of the commercial, but here is a translation of the Japanese commercial, courtesy of http://web.tampabay.rr.com/starchsr/anabuki.htm:

Anabukikonten is "Anabuki Construction Co." and their mascot seems to be
Anabukinchan! (-chan means little girl )

During this time the narrator says, "This is Anabuki Construction
Company's Campaign Girl, Anabukin-chan! She tries to be good just like
any good girl, this Anabukin-chan!"

Then it introduces everyone, but I can't make out the kanji after each
name because they are too small/blurry. The second one is "sai" though.

* Anabukinchan (you know her already!)
* Usagi (rabbit!)
* Kuma (bear!)
* Shika (deer!)
* Ookami (wolf!)

During this time the narrator is saying "What's this? It seems that the
animals of the forest are coming to join her! Everyone is in good
spirits!"

Then the narrator shouts "Sei no!" which means a song is coming up!

Everyone: Anabukin-chan! Anabukinchan, [go for it]!
Anabukin-chan: Hai! Okay!
Yume ga fukuramu Expanding dreams,
Sa-basumashon Service mansion!
Kitai ga fukuramu Expanding hopes,
Sa-basumashon Service mansion!
Mune no fukuramu Expanding chests,
Fukuramu fukuramu Expanding, expanding,Wow! Wow!
Sa-basumashon! Service mansion!

Then at the end, "ii na sa-bisu" which means "Good service!" And their
number, 0120-117-384, and their url, http://www.anabuki.co.jp/.

The raccoon is actually not a raccoon but a Tanuki, which is the Japanese
equivalent and actually considered a badger, not a raccoon. Tanuki have
classically been considered to be possessing of incredibly large balls
(kindama in Japanese - golden jewels), which they can use to perform great
feats of magic and disguise. I recommend the film Heisei Tanuki Gassen Pon
Poko (animated - Studio Ghibli (Totoro)) if you want to learn more about
Tanuki.

Also, there is a wikipedia post on the commercial, and various other results if you search google.