The Imagawa Clan is an unplayable faction in Total War: Shogun 2.
The Imagawa Clan is unusual in that it has a playable faction, the Tokugawa Clan, as a vassal state. Thus, the Tokugawa cannot declare war on other factions unless the Imagawa allows it to. The Tokugawa can circumvent this by either declaring war on the Imagawa itself (suffering large diplomatic penalties in the process), or by goading the Imagawa into declaring hostilities instead.
The Imagawa Clan was an important clan in the Sengoku Jidai. Led by Imagawa Yoshimoto, the Imagawa were allied to the Takeda Clan and the Tokugawa Clan. When their forces attacked Oda Nobunaga's army at the Battle of Okehazama, Yoshimoto was killed and his army defeated due to the sneaky tactics of the Oda Clan.
|Total War: Shogun 2 Factions|
|Sengoku Major Factions||Chosokabe Clan • Date Clan • Hojo Clan • Hattori Clan • Ikko Ikki • Mori Clan • Oda Clan • Otomo Clan • Shimazu Clan • Takeda Clan • Tokugawa Clan • Uesugi Clan|
|Sengoku Minor Factions||Utsunomiya Clan • Amako Clan • Anegakoji Clan • Asai Clan • Asano Clan • Ashikaga Clan • Ashina Clan • Bessho Clan • Hatakeyama Clan • Hatano Clan • Honma Clan • Hosokawa Clan • Imagawa Clan • Ishida Clan • Ito Clan • Jinbo Clan • Kikkawa Clan • Kiso Clan • Kitabatake Clan • Kobayakawa Clan • Kono Clan • Kuroda Clan • Matsuda Clan • Miyoshi Clan • Mogami Clan • Murakami Clan • Ogigayatsu Clan • Ouchi Clan • European Traders • Sagara Clan • Saito Clan • Sakai Clan • Satake Clan • Satomi Clan • Shoni Clan • Sogo Clan • Takaoka Clan • Tsutsui Clan • Ukita Clan • Urakami Clan • Wako Pirates • Yamana Clan • Yamanouchi Clan|