Jinbō Naganobu

神保長誠

Jinbō Clan

Jinbō Naganobu

Etchū Province

Lifespan:  14xx to 11/18 of Bunki 1 (1501)

Other Names: [Common] Echizen-no-kami, Sōemon-no-jō, Magosaburō

Rank:  bushō

Clan:  Jinbō

Lord:  Hatakeyama Masanaga → Hatakeyama Hisanobu

Bakufu:  Muromachi – Deputy military governor

Father:  Jinbō Kunimune (?)

Children:  Yoshimune, Yoshiaki

Jinbō Naganobu served as a bushō during the Muromachi and Sengoku periods.

Based at Hōjōtsu Castle in Etchū, Naganobu served as the deputy military governor of the Imizu and Nehi districts of Etchū Province, in addition to serving as a district-level deputy military governor in Kii.  He was a retainer of Hatakeyama Masanaga and Hatakeyama Hisanobu of the Hatakeyama-Bishū family.

Hatakeyama Mochikuni was a shugo daimyō during the Muromachi period, serving as the deputy shōgun of the Muromachi bakufu and as the military governor of Kawachi, Kii, Etchū, and Yamashiro provinces.  In regard to the successor to Mochikuni, Naganobu’s father quarreled with Yusa Kunisuke who backed Mochikuni’s son, Hatakeyama Yoshinari.   Mochikuni did not have a natural heir so he initially intended to have his younger brother, Hatakeyama Mochitomi, serve as his successor.  In 1448, however, he summoned his illegitimate son, Hatakeyama Yoshinari, and removed Mochitomi as the designated successor.  Some of the retainers voiced opposition and, instead, backed Mochitomi’s son, Hatakeyama Yasaburō (Masahisa).  The band of retainers then split between one faction supporting Yoshinari and the other supporting Yasaburō.  In 1454, Yusa Kunisuke (backing Yoshinari) launched an attack against the residence of Jinbō Kunimune (backing Yasaburō), leading to a violent internal conflict.  Naganobu’s father is surmised to be Jinbō Kunimune of the Yasaburō faction, but this is not certain.

Initially, the Yoshinari faction had the advantage, but Hosokawa Katsumoto and Yamana Sōzen sought to weaken the Hatakeyama clan so, with their support, Yasaburō’s faction rallied.  On 8/21, the residence was burned down and Yoshinari disappeared.  On 8/28, Mochikuni retired but, through the intervention of Ashikaga Yoshimasa, on 12/13, Yoshinari went to Kyōto while Yasaburō witnessed a fall.  In 1455, Mochikuni died and Yoshinari inherited the headship of the clan.  His supporters proceeded to  topple Hōjōtsu Castle, causing Kunimune to flee and his whereabouts became unknown.  In 1459, the Yasaburō faction returned to power and Naganobu appears in records as the head of the Jinbō clan.  After the death of Yasaburō, his younger brother, Hatakeyama Masanaga, acquired support while Naganobu and Yusa Naganao served as trusted retainers.

In 1467, after Masanaga lost a political struggle with a reinstated Yoshinari who had the backing of Yamana Sōzen and Shiba Yoshikado, Naganobu recommended to Masanaga a revolt at the Kamigoryō Shrine, triggering the Ōnin-Bunmei War.  Naganobu had friendly relations with Yasutomi Mototsuna, a close associate of Hosokawa Katsumoto, so he hoped to receive support from the Hosokawa army, but Katsumoto did not act and Masanaga’s army was defeated at the Battle of Goryō.  Thereafter, Naganobu continued to fight valiantly in numerous battles, earning enthusiastic praise from, among others, Uesugi Sadamasa.  He then returned to Etchū, seizing the landholdings of shrines and temples including the Kuragaki manor in a bid to expand his authority.

In 1493, Hosokawa Masamoto orchestrated a coup d’état to oust Ashikaga Yoshiki (the tenth shōgun of the Muromachi bakufu) and replace him with Ashikaga Yoshizumi.  This is known as the Meiō Political Incident, resulting in irreversible fractures to the ruling Ashikaga family.

Suffering from paralysis, Naganobu avoided the strife while en route to Etchū but many of his subordinates in Etchū martyred themselves along with Masanaga during a battle at the Shōkaku Temple in Kawachi.  Powerful clans in Etchū such as the Jinbō and Shiina sustained damage but Naganobu made efforts to bring the situation in Etchū under control.  Following the ouster of Yoshiki as the shōgun, a decision was made for him to be exiled to Shōdo Island.  He was incarcerated at the residence of Uehara Motohide (the head of house affairs of the Hosokawa-Keichō family) in Kyōto, but individuals under the command of Naganobu enabled him to escape.  Naganobu welcomed Yoshiki to Hōjōtsu Castle in Etchū and then renovated the Shōkō Temple to serve as a palace for the exiled shōgun.  Thereafter, Yoshiki was called the Etchū kubō after the administration he established in Etchū.

Naganobu displayed his military might by repelling numerous invasions of Etchū by Hatakeyama Motoie of the faction backing Hosokawa Masamoto.  He provided several thousand kan for expenses to a servant named Kurakawa Hyōgosuke and sent him to Kyōto to conduct maneuvers with the aim of restoring Yoshiki to his former position, demonstrating support for Yoshiki to return to Kyōto via both military and diplomatic means.  In the ninth month of 1498, Yoshiki changed his name to Yoshitō and moved to the base of Asakura Sadakage in Echizen Province.  There are assorted theories regarding the reasons for this move, including that he planned a return to Kyōto owing to prospects of peace with Masamoto’s faction, that he advanced west in pursuit of Yoshizumi, or that he turned to Echizen after falling out of favor with Naganobu.  It is noted, however, that when heading toward Echizen he was accompanied by a party of only thirteen people so it may be surmised that he was departing Etchū as a result of a conflict with Naganobu and in dire circumstances.  The following year, Yoshitō aimed to return to Kyōto by means of military force but failed and subsequently relied upon Ōuchi Yoshioki of Suō Province.  There is a theory that, at this time, Naganobu’s son, Jinbō Yoshimune, accompanied him.

In 1501, Naganobu died of illness.  There is a portrait of Naganobu in the Honkaku Temple in Tomisaki in the city of Toyama in Toyama Prefecture.  This, however, is deemed to have been created in the late Edo period.