um, i was a-wondering if anyone has Okuni's sixth weapon, and if they could tell me how to get it. any help would be much appreciated.

umm, hello?

First of all, do you have her 5th weapon?

yup!

... you were saying?

I'will try

I got this imformation from FAQ/Walkthrough


[阿国 Okuni]
Weapon : 宝蔵吉祥天
Attack : +56
Element : 紅蓮 Red Lotus
Status :
体力 HP +47
間接防御力 Arrow Defense +72
跳躍力 Jump +50
攻撃範囲 Attack Radius +66
Stage : 川中島の舞 Dance of Kawanakajima (4th Stage)
Method :
Defeat all enemy generals and sub-generals except 武田信玄 Takeda Shingen and
上杉謙信 Uesugi Kenshin.
Supply troop appears from the entry point where 阿国 Okuni did her dance,
moving towards 武田 Takeda base.
Muni Comment :
After succeeding in the dance mission at the start of the battle, don't go to
meet 武田信玄 Takeda Shingen or 上杉謙信 Uesugi Kenshin, instead start
defeating all their generals and sub-generals on the battlefield.
Enemy generals and sub-generals must be defeated by 阿国 Okuni personally. If
one is defeated by the opposing side, the weapon is lost.
武田信繁 Takeda Nobushige (武田軍 Takeda side) and 斎藤朝信 Saitou Tomonobu
(上杉軍 Uesugi side) will be the most easily defeated by their opposing side,
so take care of them earlier on.
Here's a suggestion of the order of enemies to defeat:
1. 武田義信 Takeda Yoshinobu (will appear at the dance location).
2. 本庄繁長 Honjyou Shigenaga.
3. 武田信繁 Takeda Nobushige, 村上義清 Murakami Yoshikiyo.
4. 山本勘助 Yamamoto Kansuke, 原昌胤 Hara Masatane, 柿崎景家 Kakizaki Kageie,
甘粕景継 Amakasu Kagetsugu.
5. 斎藤朝信 Saitou Tomonobu, くのいち Kunoichi, 真田幸村 Sanada Yukimura.
6. 鬼小島弥太郎 Onikojima Yotarou.
7. 色部勝長 Irobe Katsunaga, 直江景綱 Naoe Kagetsuna, 内藤昌豊 Naitou Masatoyo,
馬場信房 Baba Nobufusa.
8. 武田信廉 Takeda Nobukado, 高坂昌信 Kousaka Masanobu.

Hope it helps