As the launch of the game gets closer and closer for its Japanese debut on Nov. 21st, Square Enix (Japan) released videos of new costumes for the main characters based on Japanese armor. In the first video, you can see a bit of the seven armors in action, but if you prefer seeing more of each costume individually, just watch them all the trailers.
【LRFFXIII】和風甲冑衣装シリーズ
【LRFFXIII】和風甲冑衣装「うつせみ」
【LRFFXIII】和風甲冑衣装「風林火山」
【LRFFXIII】和風甲冑衣装「天下布武」
【LRFFXIII】和風甲冑衣装「風姿花伝」
【LRFFXIII】和風甲冑衣装「鬼夜叉」
【LRFFXIII】和風甲冑衣装「雷威式正鎧」
【LRFFXIII】和風甲冑衣装「金剛菩薩」
[Source]: Square Enix via YouTube.