Service under Nobunaga and appointment as kampaku
Hideyoshi came from Owari and used names including Kinoshita Tokichiro and Hashiba Tokichiro. Nagoya City Museum notes evidence for both 1536 and 1537 as his birth year. Later biographies and theatre embellished his early career, making documentary evidence especially important.
Serving Oda Nobunaga, he acquired bases at Nagahama and Himeji. After Nobunaga's death in 1582, victories over Akechi Mitsuhide and then Shibata Katsuie strengthened his position among the former retainers. In 1585 an adoptive relationship with the Konoe house enabled his appointment as kampaku under the Fujiwara name. Appointment documents survive.
Military consolidation, land and status
Using Osaka as a political centre, Hideyoshi extended his authority through campaigns and territorial arrangements, compelling the Hojo of Odawara to submit in 1590. Land surveys assessed productive capacity in rice-equivalent measures and supplied a basis for tribute. Weapons collection sought to disarm cultivators and reinforce distinctions between them and warriors.
Orders, land registers, grants and court appointments all contributed to this government. Military victory worked alongside negotiated status and documentary administration. The resulting arrangements affected temples, local warriors and cultivators as well as the major lords whose allegiance Hideyoshi demanded.
The Korean invasions and succession
In 1592 Hideyoshi ordered an invasion of Korea, intending to advance toward Ming China. Korean and Ming resistance was followed by negotiations. A Ming investiture document dated 1595, preserved by Osaka Museum of History, records one proposed diplomatic arrangement. Negotiation failed to secure lasting peace, and a second invasion began in 1597.
The campaigns devastated Korean communities and imposed heavy mobilization costs in Japan. Japanese forces withdrew after Hideyoshi died in 1598. His young son Hideyori inherited an unsettled position among powerful lords; Tokugawa Ieyasu's subsequent ascent and the Toyotomi defeat at Osaka in 1615 belong to the struggle that followed.