風林火山 [fuurin kazan] in Japanese. It is a saying that means "as fast as the wind, as quiet as the forest, as daring as fire, and immovable as the mountain".
Airborne Brigade

SSR+
Type: Katana, Element: -, Growth: ?, Cost: ?
Attack: 24,835 (lv1), 72,742 (lv200), ? (lv230), ? (lv260), ? (lv290), 101,632 (lv320)
Defense: 22,155 (lv1), 68,645 (lv200), ? (lv230), ? (lv260), ? (lv290), 96,680 (lv320)
Obtain: ?
SSR
Type: Katana, Element: -, Growth: ?, Cost: ?
Attack: 13,315 (lv1), ? (lv200), ? (lv220), ? (lv240), ? (lv260), ? (lv280)
Defense: 11,629 (lv1), ? (lv200), ? (lv220), ? (lv240), ? (lv260), ? (lv280)
Obtain: ?
Pictlogica

Stats (lv1): STR +72
Stats (lv20): STR +115
Buy: - (sell: ? gil)
Obtain: -
Alchemy: Corruptor, Magicite Shard, Emerald
Type: Katana, Rarity: ★★★★, Element: -
Category: Equipment