  the  took place in 1575 near nagashino castle (é·ç¯ å) on the plain of shitaragahara (è¨­æ¥½å) in the mikawa province (ä¸æ²³) of japan. forces under takeda katsuyori (æ­¦ç°åé ¼) had besieged the castle since the 17 june; okudaira sadamasa (å¥¥å¹³è²æ), a tokugawa vassal, commanded the defending force. the takeda forces attacked the castle because it threatened takeda's supply lines. both tokugawa ieyasu (å¾³å·å®¶åº·) and oda nobunaga (ç¹ç°ä¿¡é·) sent troops to break the siege and their combined forces defeated takeda katsuyori (æ­¦ç°åé ¼). nobunaga's skillful use of firearms to defeat takeda's cavalry tactics is often cited as a turning point in japanese warfare; many cite it as the first 'modern' japanese battle. in fact, the cavalry charge had been introduced only a generation earlier by katsuyori's father, takeda shingen (æ­¦ç°ä¿¡ç). furthermore, firearms had already been used in other battles. oda nobunaga's innovation was the wooden stockades and rotating volleys of fire which led to a decisive victory at nagashino. ==battle==  according to the shinchÅ kÅki oda nobunaga and tokugawa ieyasu brought a total force of 38,000 men to relieve the siege on the castle by takeda katsuyori. of takeda's original 15,000 besiegers, only 12,000 faced the oda-tokugawa army in this battle. the remaining 3000 continued the siege to prevent the garrison in the ca
1575_in_Japan Battles_of_the_Sengoku_period Conflicts_in_1575 Sieges_involving_Japan