Character Unlocking SW

From Dynasty Warriors - Wiki on Neoseeker

Here's how to unlock the characters you don't initially start off with.

• Goemon Ishikawa -- Clear Okuni's campaign.
• Keiji Maeda -- Play Kenshin Uesugi's campaign, at the Siege of Gifu fail the mission to eliminate Keiji. In Gifu Castle on the 4th floor, Keiji and Nobunaga Oda will be there, kill Nobunaga Oda but not Keiji and after the final level of the campaign you'll have unlocked Keiji Maeda.
• Kunoichi -- Clear Hanzo Hattori and Shingen Takeda's campaigns.
• Magoich Saika -- Clear any campaign.
• Masamune Date -- Clear any two campaigns.
• Nobunaga Oda -- Clear Oichi, Magoichi Saika and Noh's campaigns.
• Noh -- Clear Ranmaru Mori's campaign.
• Okuni -- Clear Keiji Maeda's campaign.
• Ranmaru Mori -- Clear Mitsuhide Akechi's campaign.
• Shingen Takeda -- Clear Yukimura Sanada's campaign.