Kanazawa Castle & Former IJA 9th Division Headquarters Site

Kanazawa Castle (金沢城, Kanazawa-jō) and the site of the former Imperial Japanese Army 9th Division Headquarters (陸軍第九師団司令部跡) occupy the hilltop grounds in Kanazawa City, Ishikawa Prefecture. This castle — seat of the Maeda clan, the wealthiest feudal domain in Edo-period Japan — became one of the most significant military installations in the Hokuriku region during the modern era, serving as the cradle of a division whose soldiers fought in every major conflict from the Russo-Japanese War to the end of World War II.

Origins of the 9th Division at Kanazawa (1873–1898)

Kanazawa's military significance in modern Japan dates to the 1870s: Kanazawa Castle passed to the Army Ministry in 1873 (Meiji 6), and from 1875 the 7th Infantry Regiment of the new conscript army was stationed on its grounds. Following the First Sino-Japanese War (1894–95), the Imperial Japanese Army underwent a major expansion. On 1 October 1898 (Meiji 31), the 9th Division (第九師団) was newly established at Kanazawa, one of six new divisions created under the military expansion program. The division recruited troops primarily from the three Hokuriku prefectures of Ishikawa, Toyama, and Fukui, and received its colors on 1 October 1898, with the headquarters officially settling in Kanazawa Castle on 29 November 1898.

The division's initial organization comprised the 6th Infantry Brigade (headquarters: Kanazawa) with the 7th Infantry Regiment (Kanazawa) and 35th Infantry Regiment (Toyama), and the 18th Infantry Brigade (headquarters: Tsuruga) with the 19th Infantry Regiment (Tsuruga) and 36th Infantry Regiment (Sabae), along with the 9th Cavalry Regiment, 9th Field Artillery Regiment, and 9th Engineer Battalion.

The Headquarters Building (1898/1916)

The original divisional headquarters was a two-story Western-style wooden building constructed in 1898 on the Ninomaru (second bailey) of Kanazawa Castle, featuring a Renaissance-influenced design with a symmetrical facade, pediment, and pilaster decorations. A new, larger headquarters building was completed on 30 April 1916 (Taishō 5) within the castle grounds. These buildings served as the administrative nerve center for the division and its subordinate units.

Russo-Japanese War and the Siege of Port Arthur (1904–1905)

The 9th Division's baptism of fire — and the campaign that forged its legendary reputation — came during the Russo-Japanese War. Under its first commander, Lieutenant General Oshima Hisanao (大島久直), the division was assigned to General Nogi Maresuke's Third Army for the Siege of Port Arthur (旅順攻囲戦), one of the most brutal engagements in modern military history.

Beginning in August 1904, the Third Army launched repeated frontal assaults against the heavily fortified Russian positions surrounding Port Arthur. The 9th Division attacked the eastern forts, including Panlongshan (盤龍山) and Erhlung Mountain (二龍山), while 203 Hill (二〇三高地) was captured on 5 December 1904 mainly by the 1st and 7th Divisions. The fighting was extraordinarily costly — the division suffered catastrophic casualties, with all of its regimental commanders wounded during the siege. The 1980 film '203 Hill' (二百三高地), starring Nakadai Tatsuya, prominently featured a lieutenant from the Kanazawa 9th Division as one of its protagonists, cementing the division's association with this iconic battle in Japanese popular memory.

Survivors of Port Arthur were subsequently committed to the Battle of Mukden (奉天会戦, February–March 1905), where the division suffered further heavy losses, including the death of the 9th Mountain Artillery Regiment commander.

Interwar Period: Siberia, Shanghai, and China (1921–1939)

The 9th Division participated in the Japanese intervention in Siberia, deploying to Vladivostok in April 1921.

During the First Shanghai Incident (January 1932), elements of the 9th Division were deployed as reinforcements. In the Second Sino-Japanese War, the division was mobilized in 1937 and deployed to the Shanghai front under General Matsui Iwane's Shanghai Expeditionary Army. The 9th Division subsequently participated in the Nanking Campaign (December 1937), the Xuzhou Campaign, and the Wuhan Campaign, remaining in China through June 1939.

Manchuria and the Road to the Pacific War (1940–1944)

In August 1940, the 9th Division was permanently relocated from Kanazawa to Manchuria (Manchukuo) as a garrison force under the Third Army (第3軍), responsible for border security against the Soviet Union and internal police duties. The castle grounds in Kanazawa were subsequently used by replacement training units and the Kanazawa District Army command.

The Fateful Transfer: Okinawa to Taiwan (1944)

Following the fall of Saipan in June 1944 and the collapse of Japan's inner defense perimeter, the 9th Division was reassigned in July 1944 to the 32nd Army (第32軍) for the defense of Okinawa. As a battle-hardened, full-strength division, it was intended to serve as the core of Okinawa's ground defense. The 32nd Army's chief strategist, Colonel Yahara Hiromichi, built the island's defensive plan around the 9th Division as the primary counterattack force.

However, in November 1944, following the disastrous Taiwan Air Battle (台湾沖航空戦) and the American landings on Leyte, Imperial General Headquarters ordered a chain of reinforcement transfers for the Philippines campaign: the 10th Division was sent from Taiwan to Luzon, and the 9th Division was extracted from Okinawa to Taiwan to fill the gap. Transfer orders were issued on 17 November 1944, and the division completed its move to Taiwan by late December.

This decision proved catastrophic for Okinawa's defense. The extraction of the 9th Division — the 32nd Army's strongest formation — left a gap that could never be filled. When American forces landed on Okinawa on 1 April 1945, the defenders were fatally weakened. The subsequent Battle of Okinawa became one of the bloodiest engagements of the Pacific War, with approximately 100,000 Japanese military dead and an estimated 100,000 Okinawan civilian casualties. Postwar, Colonel Hattori Takushiro, then chief of the Operations Section at Imperial General Headquarters, described the extraction of the 9th Division as a moment when 'an evil spirit possessed us — the blunder of a lifetime' (魔がさしたとしか思えない。一世一代の不覚であった).

The 9th Division remained in Taiwan under successive commands and ended the war there in August 1945 without engaging in further combat. Its final commanders were Lieutenant General Hara Mamoru (1942–45) and Lieutenant General Tasaka Yatsuhachi (April–August 1945).

The Headquarters Building: Relocation and Preservation

After Japan's surrender, the military facilities at Kanazawa Castle were dismantled. The castle grounds were gradually converted into Kanazawa Castle Park (金沢城公園), and extensive restoration of the castle's Edo-period structures has been undertaken, including the reconstruction of the Hishi Yagura (菱櫓), Gojikken Nagaya (五十間長屋), and Hashizume-mon Gate in 2001.

The original 1898 9th Division headquarters building — a two-story Western-style wooden structure — was relocated in 1968 from the castle's Ninomaru to a site at Ishibiki 4-chome, approximately 800 meters south of the castle. After serving as the Ishikawa Prefectural Government Ishibiki Branch Office (石川県庁舎石引分室), the building was extensively restored and reopened in October 2020 as part of the National Crafts Museum (国立工芸館, Kokuritsu Kōgei Kan), alongside the adjacent former Army Officers' Club (旧陸軍金沢偕行社, built 1909). Both buildings are designated as registered tangible cultural properties of Japan (国登録有形文化財).

Today, visitors to Kanazawa Castle Park walk through grounds that once served as the staging area for one of Japan's most storied military divisions — from the frozen trenches of Port Arthur to the battlefields of China to the fateful transfer that altered the course of the Battle of Okinawa.