The hidden fortress

The Hidden Moon (Kakureta tsuki)

Art Institute of Chicago

Art Institute of Chicago API

Hidden Love

Philadelphia Museum of Art

Philadelphia Museum of Art collection

Hidden Spring

Minneapolis Institute of Arts

Minneapolis Institute of Art API

Goryōkaku Fortress

Honolulu Museum of Art

Honolulu Museum of Art Collection

General Odera Defends the Captured Fortress Near Weihaiwei

The Walters Art Museum

The Walters Art Museum API

General Odera Defends the Captured Fortress Near Weihaiwei

The Walters Art Museum

The Walters Art Museum API

General Odera Defends the Captured Fortress Near Weihaiwei

The Walters Art Museum

The Walters Art Museum API

Taking Tienjin Fortress

Minneapolis Institute of Arts

Minneapolis Institute of Art API

Hidden in Deep Mountains (Miyama gakure)

Honolulu Museum of Art

Honolulu Museum of Art Collection

Explosion At Chinchou Fortress

Freer and Sackler

DPLA API

Explosion at Chinchou Fortress

Philadelphia Museum of Art

Philadelphia Museum of Art collection

Capturing the Fortress at Niuzhuang (Gyusojo senryo)

Art Institute of Chicago

Art Institute of Chicago API

Present-Day Kagesue (The First Climber of the Enemy Fortress)

Philadelphia Museum of Art

Philadelphia Museum of Art collection

Photographing our troops fighting in the fortress town Ninzhuang

Freer and Sackler

DPLA API

Otaiya [electronic resource] : Japan's hidden Christians

Stanford University Libraries

Stanford Libraries SearchWorks

A Fierce Battle at the Chinchou Fortress (Kinshūjō gekisen)

Philadelphia Museum of Art

Philadelphia Museum of Art collection

History of the Hidden Protection in Japan and China (Wakan inshitsu den)

Harvard Art Museums

Harvard Art Museums API

Kozuka with Autumn Flowers and Hidden Shunga Scene

The Walters Art Museum

The Walters Art Museum API

The Japanese Forces Occupy the Fortress of K'Aiping (Gaiheijō senryō no zu)

Philadelphia Museum of Art

Philadelphia Museum of Art collection

Monkeys Carrying Food to the Hidden Princess, from the series The Tale of the Monkeys of Utsuho (Utsuho monogatari)

Harvard Art Museums

Harvard Art Museums API

The Japanese Army Occupies the Kiuliencheng Fortress (Waga gun daishōri Kyurenjō senryō)

Philadelphia Museum of Art

Philadelphia Museum of Art collection

View of the fortress of Lucera, Italy, from the moat - Photograph taken by George Kaye

Alexander Turnbull Library

DigitalNZ New Zealand API

Japanese Accentor hidden in the bush

Osaka Museum of Natural History

Movie Archives of Animal Behavior

Flying Fortress aircraft used to escort Beechcraft to Japan

Alexander Turnbull Library

DigitalNZ New Zealand API