Editing Tokugawa Ieyasu (section)

===Death of Hideyoshi and Toshiie===
Toyotomi Hideyoshi, after three more months of deteriorating health, died on September 18, 1598<!-- (Japanese calendar:August 18, Keichō 3(慶長3年))-->. He was nominally succeeded by his young son [[Toyotomi Hideyori|Hideyori]] but as he was just five years old, the real power was in the hands of the regents.{{citation needed|date=May 2024}} There were several incidents involving Ieyasu after the death of Hideyoshi:

* The government of Japan under Toyotomi's rule had an incident when seven military generals ([[Fukushima Masanori]], [[Katō Kiyomasa]], [[Ikeda Terumasa]], [[Hosokawa Tadaoki]], [[Asano Yoshinaga (Lord of Hiroshima)|Asano Yoshinaga]], [[Katō Yoshiaki]], and [[Kuroda Nagamasa]]) came into conflict with Ishida Mitsunari. It was said that the reason for this was that they were dissastisfied with Mitsunari because he wrote poor assessments and underreported their achievements during the [[Japanese invasions of Korea (1592–1598)|Imjin War]] against Korea and the Chinese empire.<ref name="7 generals conspiracy; Mizuno" /> At first, these generals gathered at Kiyomasa's mansion in [[Osaka Castle]], and from there they marched to Mitsunari's mansion. However, Mitsunari learned of this through a report from a servant of [[Toyotomi Hideyori]] named Jiemon Kuwajima and he fled to [[Satake Yoshinobu]]'s mansion together with [[Shima Sakon]] and others to hide.<ref name="7 generals conspiracy; Mizuno">{{Cite journal |author =Mizuno Goki |title = 前田利家の死と石田三成襲撃事件 |trans-title=Death of Toshiie Maeda and attack on Mitsunari Ishida |date = 2013 |journal = 政治経済史学 |issue = 557号 |pages = 1–27 |url=https://cir.nii.ac.jp/crid/1520290885037880832 |language=Ja}}</ref> When the seven generals found that Mitsunari was not in the mansion, they searched the mansions of various feudal lords in Osaka Castle, and Katō's army approached the Satake residence. Mitsunari and his party then escaped from the Satake residence and barricaded themselves at [[Fushimi Castle]].<ref name="kasaya2000">{{Cite journal |author = Kasaya Kazuhiko|title = 豊臣七将の石田三成襲撃事件―歴史認識形成のメカニズムとその陥穽― |trans-title=Seven Toyotomi Generals' Attack on Ishida Mitsunari – Mechanism of formation of historical perception and its downfall |date = 2000 |journal = 日本研究 |issue = 22集 |language=Ja}}</ref> 

The next day, the seven generals surrounded Fushimi Castle with their soldiers as they knew Mitsunari was hiding there. Ieyasu, who was in charge of political affairs in Fushimi Castle at that moment, attempted to arbitrate the situation. The seven generals requested Ieyasu hand over Mitsunari, which Ieyasu refused. Ieyasu then negotiated a promise to let Mitsunari retire and to review the assessment of the Battle of Ulsan Castle in Korea. Ieyasu had his second son, [[Yūki Hideyasu]], escort Mitsunari to Sawayama Castle.<ref>{{Cite journal |author = Kasaya Kazuhiko |title = 徳川家康の人情と決断―三成"隠匿"の顚末とその意義― |trans-title=Tokugawa Ieyasu's humanity and decisions – The story of Mitsunari's "concealment" and its significance |date = 2000 |journal = 大日光 |issue = 70号 }}</ref>{{efn|historian Watanabe Daimon stated from the primary and secondary sources text about the accident this was more of legal conflict between those generals with Mitsunari, rather than conspiracy to murder him. The role of Ieyasu here was not to physically protect Mitsunari from any physical harm from them, but to mediate the complaints of those generals.<ref name="7 generals Mitsunari; Watanabe Daimon">{{cite web |title=七将に襲撃された石田三成が徳川家康に助けを求めたというのは誤りだった |url=https://news.yahoo.co.jp/expert/articles/b9b580be2b347ecaf183e72ab6eb4039a09af98d |website=yahoo.co.jp/expert/articles/ |publisher=渡邊大門 無断転載を禁じます。 © LY Corporation |access-date=2 June 2024 |language=Ja}}</ref>}}{{efn|Historians viewed this incident were not just simply personal problems between those seven generals against Mitsunari, as it was viewed as an extension of the political rivalries between the Tokugawa faction and the anti-Tokugawa faction which was led by Mitsunari. Following this incident, those military figures on bad terms with Mitsunari would support Ieyasu later during the conflict of Sekigahara between the Eastern army led by Tokugawa Ieyasu and the Western army led by Ishida Mitsunari.<ref name="7 generals conspiracy; Mizuno" /><ref>{{Cite book|author=Mizuno Goki|chapter=石田三成襲撃事件の真相とは|trans-title=What is the truth behind the Ishida Mitsunari attack?|editor1=Watanabe Daimon |title=戦国史の俗説を覆す|publisher=柏書房|date=2016|language=Ja}}</ref> Muramatsu Shunkichi, writer of "''The Surprising Colors and Desires of the Heroes of Japanese History and violent womens''”, gave his assessment that the reason of Mitsunari failure in his war against Ieyasu was due to his unpopularity among the major political figures of that time.<ref>{{cite book |title=歴代文化皇國史大觀 |trans-title=Overview of history of past cultural empires |date=1934 |publisher=Oriental Cultural Association |location=Japan |page=592 |url=https://books.google.com/books?id=bYHLa7bOSwAC |access-date=23 May 2024 |language=Ja}}</ref>}}

* Tokugawa ordered his general, Sakakibara Yasumasa, to lead an army from Kantō to camp in Seta, Ōmi Province as a means of showing off and intimidating the bureaucratic faction which was led by Ishida Mitsunari, because Ōmi was the traditional hometown of the Mitsunari clan.<ref name="setaarmySakakibara">{{cite book |author1=Kazuo Murayama |title=名将言行録|trans-title=meishō genkō-roku/A record of famous generals’ words and deeds |date=1991 |publisher=講談社 |isbn=4062921774 |quote=[[Arai Hakuseki]] 藩翰譜 (clan records); [[:jp:名将言行録|Shigezane Okaya (1835-1920)]]}}</ref>

* In 1599, a riot occurred within the [[Ukita clan]] when several of Ukita clan vassals, including Togawa Tatsuyasu,<ref>{{cite book |title=日本戦史‧関原役: 第五篇| trans-title=Japanese War History‧Sekihara Role: Part 5 |chapter=2}}[{{NDLDC|771069/115}}]</ref> Sadatsuna Oka and others, rebelled against Hideie.<ref name="hideieriot">{{cite book|author=Yasumasa Onishi|title=「豊臣政権の貴公子」宇喜多秀家|trans-title=''Noble Prince of the Toyotomi Administration'' Hideie Ukita|publisher=Kadokawa |series=角川新書|date=2019}}</ref> At first, Ieyasu sent his general [[Sakakibara Yasumasa]] to mediate the disputes between Ukita Hideie and his various rebellious vassals. However, the situation was not resolved for a long time so Ieyasu ordered Yasumasa to return to his post and decided to resolve the case himself. Ieyasu managed to solve the case and averted a civil war between two factions. However, in the aftermath of this incident many of Hideie retainers such as [[Sakazaki Naomori]] changed their allegiance to Tokugawa Ieyasu and left Hideie. These defections caused massive setbacks for the Ukita clan politically and militarily, while strengthening Ieyasu.<ref name="豊臣期の宇喜多氏と宇喜多秀家; Sakakibara Yasumasa">{{cite book |author1=大西泰正 |title=豊臣期の宇喜多氏と宇喜多秀家 |date=2010 |isbn=9784872946123 |publisher=岩田書院 |page=99 |url=https://books.google.com/books?id=0tlMAQAAIAAJ |access-date=10 May 2024 |language=Ja}}</ref>

* In April 1599, Ieyasu cited Hideyoshi's will as pretext for him to review the decision regarding the [[Mōri clan]] territories that Mitsunari had pushed through, and pressed [[Mōri Terumoto]] to allocate part of [[Nagato Province]] and [[Suō Province]] to [[Mōri Hidemoto]].{{sfn|Mitsunari|2016|pp=250–251}} In June, Ieyasu's manifesto to curtail Terumoto's domains was implemented, as Hidemoto had been given the former [[Mōri Motokiyo]] territory of Nagato, Yoshiki District in Suō, Aki, and Bingo, leaving [[Kikkawa Hiroie]]'s territory intact, and returned [[Kobayakawa Takakage]]'s estate to Terumoto.{{sfn|Mitsunari|2016|p=251}}

* Ieyasu had his general and diplomat, Ii Naomasa, establish contact with the scions of [[Kuroda clan]], [[Kuroda Yoshitaka]] and Kuroda Nagamasa, and gained their political support.{{sfn|Noda|2007}}

* On September 12, 1599, when Ieyasu returned to Fushimi castle from Osaka castle, there was an alleged assassination attempt by three Toyotomi Hideyoshi vassals named  Katsuhisa Hijikata, [[Asano Nagamasa]], and [[Ōno Harunaga]]. Their attempt to assassinate Ieyasu failed due to Ieyasu's tight security and bodyguards. When they were apprehended, further investigation also linked the assassination attempt with [[Maeda Toshimasa]], son of Maeda Toshiie. Ieyasu consulted with [[Honda Masanobu]] about the proper punishment for each conspirator, Masanobu instead advised Ieyasu to show leniency towards the three perpetrators. In the end, Ieyasu accepted Masanobu's counsel and decided that he would not execute them, in exchange, he placed Hijikata and Katsuhisa on house arrest on northern side of the Kantō region. Meanwhile, Nagamasa was given a far more lenient punishment than his compatriots by only being ordered to move his residence, Musashi Fuchū, as Ieyasu saw Nagamasa had an important political position in the government. As for Toshimasa, Ieyasu prepared a harsh punishment and he prepared to dispatch his army to Kaga in order to subjugate Toshinaga, who was one of the Five Elders. In response, Toshinaga sent his subordinate, Nagatomo Yokoyama, to Ieyasu and immediately apologized to Ieyasu. Furthermore, he sent his mother, Hoshunin, as a hostage to Edo, and arranged for his adopted heir, Toshitsune, to marry Hidetada's daughter, Tamahime. Due to those four men later supporting Ieyasu in the Sekigahara war against Mitsunari, modern historian Daimon Watanabe saw Tokugawa's lenient attitude towards his would-be assassins as a political move to gather more allies to would support him in the future war.<ref>{{cite web |author1=Daimon Watanabe |title=徳川家康暗殺未遂事件とその後の経過…政治的影響を考慮した家康はどんな処置を下したのか？ |trans-title=The assassination attempt of Ieyasu Tokugawa and its aftermath...What measures did Ieyasu take in consideration of the political impact? |url=https://sengoku-his.com/428 |website=sengoku-his.com |access-date=28 May 2024 |language=Ja |date=2023 |quote=Referencing      Goki Mizuno “Re-criticism of the Kaga Conquest” fictional theory” (Research Collection History and Culture No. 8, 2021)}}</ref>

* Tokugawa married his sixth son, [[Matsudaira Tadateru]], to [[Irohahime]], the first daughter of Date Masamune.<ref>{{cite book |author1=Satoshi Okamoto (岡本哲志) |title=江戸→TOKYO なりたちの教科書３ 東京の基盤をつくった「武家屋敷物語」 |date=2018 |publisher=淡交社 |page=23 |url=https://books.google.com/books?id=6HjcEAAAQBAJ |access-date=29 May 2024 |language=Ja}}</ref> 

Ieyasu also gained support from Mogami Yoshiaki, brother-in-law of Masamune and a powerful eastern daimyo, who had held a grudge against the Toyotomi clan since Hideyoshi executed his daughter in the Hidetsugu Incident of 1595.{{sfn|Kanie|1990|p=443}} Hidetsugu had been accused of treason and forced to commit seppuku at [[Mount Kōya]]. In the aftermath of this incident, his entire family was also executed at Sanjogawara. Yoshiaki's daughter, Komahime, who was only 15 years old and had recently married Hidetsugu, was executed as a result. Yoshiaki begged for her life to be spared as she hadn't even met Hidetsugu yet, but his request was refused. Komahime was beheaded along with the others, and her body dumped in the Sanjogawara River. As result of the execution, Yoshiaki's wife, Osaki-dono, was struck with deep grief by the sudden death of her daughter and died on August 16. After this, Yoshiaki grew closer to Ieyasu and became one of his strongest supporters.<ref name="Kenji Matsuo; Mogami Yoshiaki">{{cite web |author1=Kenji Matsuo (松尾剛次) |title=伊達と上杉の宿敵「最上義光」...梟雄と語られてきた戦国大名の知られざる素顔 |trans-title=The sworn enemy of the Date and Uesugi clans, "Mogami Yoshiaki"... The unknown face of the Sengoku lord who was described as a warlord |url=https://rekishikaido.php.co.jp/detail/10839 |website=Rekishikaido |publisher=PHPオンライン |access-date=14 June 2024 |language=Ja |date=2024}}</ref>

* Another incident occurred in 1595 with the [[Shimazu clan]], when [[Shimazu Tadatsune]], the third son of [[Shimazu Yoshihiro]] and heir to the main Shimazu family, assassinated a clan's chief vassal named Ijuin Tadamune. The background to this incident seems to be that Tadamune, who was on close terms with Ishida Mitsunari, had infringed on the Shimazu clan's domain. However, the incident did not end there, and Tadamune's eldest son, Ijuin Tadamasa, started a rebellion. As the civil war reached deadlock, Ieyasu mediated the two sides, which resulted in Tadamasa surrendering in March 1600.<ref name="Shimazu Sekigahara">{{cite web |author1=pinon |title=「島津豊久」は父・家久と伯父・義弘の薫陶を受けた名将であった！ |trans-title=Shimazu Toyohisa was a famous general who was mentored by his father, Iehisa, and his uncle, Yoshihiro! |url=https://sengoku-his.com/102 |website=戦国ヒストリー |publisher=sengoku-his.com |access-date=11 June 2024 |language=Ja |date=2024 |quote=Kirino Sakujin (関ヶ原島津退き口―敵中突破三〇〇里― / Shimazu's Retreat at Sekigahara: Breaking Through Enemy Lines 300 Miles (Gakken Publishing, 2010); Niina Kazuhito(薩摩島津氏 / Satsuma Shimazu Clan) (Ebisu Kosho Publishing, 2014);  Niina Kazuhito (島津家久・豊久父子と日向国 / Shimazu Iehisa and Toyohisa, Father and Son, and Hyuga Province ) (Miyazaki Prefecture, 2017); Niina Kazuhito (「不屈の両殿」島津義久・義弘　関ヶ原後も生き抜いた才智と武勇 / Shimazu Yoshihisa and Yoshihiro: The "Indomitable Princes" – The Wisdom and Bravery that Survived After Sekigahara) (Kadokawa、2021年)}}</ref>