Cannot read this kind of calligraphy writing

[Fearabhata]

Modarator's note:
These posts are moved from the thread Help translating Mitsui Shinna calligraphy

I wanted first post a new thread, but might as well post it here. I just cannot read this kind of calligraphy writing.
The third kanji seems to be 義(gi) but that is all I can say about it :/
Oh, and the figurine is a Naginata wielding monk of some sorts, but it does not depict Uesugi Kenshin .

 

[Fearabhata]

And the second passage says 国宝 (national treasure)..

 

[Toritoribe]

伝源義経
国宝
竹雀虎金物大鎧
鎌倉時代大鎧は彫刻意匠を
凝りはじめ総合的美術性をか
もし出しています
本品はこの時代の作品で甲冑
工芸の最高水準をゆくといわれる
竹雀虎金物大鎧を参考に
製作致しました
鎧師大野龍玉作

It's modern Japanese, so you can understand it, right?

 

[Fearabhata]

伝源義経
国宝
竹雀虎金物大鎧
鎌倉時代大鎧は彫刻意匠を
凝りはじめ総合的美術性をか
もし出しています
本品はこの時代の作品で甲冑
工芸の最高水準をゆくといわれる
竹雀虎金物大鎧を参考に
製作致しました
鎧師大野龍玉作

It's modern Japanese, so you can understand it, right?

Sure can
But reading such kind of texts is like deciphering hieroglyphics.
Kudos for those who can!