Ishida Masazumi (????-1600) Ishida Masazumi, the younger son of the notable Ishida Mitsunari. Masazumi held the Sawayama Castle in Omi Province for the sake of his elder brother, while Mitsunari was making the preparations for the upcoming Battle of Sekigahara. Following the battle, in the end the Sawayama Castle was besieged in 1600 and Masazumi had no choice but to commit suicide. 1597 1598 1599 - 1600 - 1601 1602 1603 |- | align=center colspan=2 | Decades: 1570s 1580s 1590s - 1600s - 1610s 1620s 1630s |- | align=center | Centuries: 15th century - 16th century - 17th century |} // Events January January 1 - Scotland adopts January 1st as being New Years Day February February 17 - Giordano Bruno burned at the... Ishida Mitsunari (石田 三成 Ishida Mitsunari 1560 - November 6, 1600) was a samurai who led the West side in the Battle of Sekigahara. ... Categories: Japan geography stubs | Old provinces of Japan ... Combatants forces loyal to Toyotomi Hideyori forces of Tokugawa Ieyasu Commanders Ishida Mitsunari, others Tokugawa Ieyasu, others Strength 82,000 74,000 Casualties The Battle of Sekigahara or popularly known as the Realm Divide was a decisive battle on September 15, 1600 (on the ancient Chinese calendar, October 21 on... 1597 1598 1599 - 1600 - 1601 1602 1603 |- | align=center colspan=2 | Decades: 1570s 1580s 1590s - 1600s - 1610s 1620s 1630s |- | align=center | Centuries: 15th century - 16th century - 17th century |} // Events January January 1 - Scotland adopts January 1st as being New Years Day February February 17 - Giordano Bruno burned at the...