Gassantoda Castle : A Study of Japanese Bibliography

This is all about Gassantoda Castle Ruins you want to know.
Every information you get on this site will be from a credible source based on Japanese history (books for reference).

"Todagassan-Jō no zu" (picture in Edo Period)" from Yasugi City Board of Education

There are two typical castle pictures in the Edo period,the one is collected by the Inagaki family, the Toba Daimyō from the mid-Edo period to the Meiji Restoration, as materials for military studies. There are about 350 illustrations, but there is no uniformity because only illustrations of castles, illustrations including castle towns, and old battlefield illustrations are mixed.

Another is "The Shōhō Shiroezu", picture of the castle and castle town that the Edo Shogunate ordered the daimyō to create and submit,aggregating military information such as the buildings inside the castle, the height of the stone wall, the width of the moat and the water depth, etc., it also details the location and shape of the castle town and the mountain river.

Profile : Gassantoda Castle Ruins

LocationYasugi City, Shimane Prefecture
Also known asGassan Castle
Type of castleMountaintop
Mountain's nameMt.Gassan
DesignationNational Historic Sites
Year built1163~1189
Castle lordAmago Clan
Refurbishment lordHorio Yoshiharu
Portrait of Yamanaka Shikanosuke from ”Taiheiki Hero Stories"
by Utagawa Yoshiiku

A very famous warlord in the Warring States period who served Amago.
Even after Amago's demise, he fought back to rebuild and headed toward Mōri Clan repeatedly who his enemy of huge power in Chūgoku District,
as a proud military commander.
Family Crest of Amago Clan from "Wikipedia"

The family crest was originally created from the pattern that the emperor and the royal family put on the kimono, and the pattern was made into a fixed pattern, and the one attached to his own oxcart is said to be the beginning of the family crest. The warlords drew large crests on the flag-fingers, used to distinguish enemy views on the battlefield, and used by the generals to determine which warlords were active and how much.

Gassantoda Castle admission

admission fee : free
admission time : free
reference official site

Gassantoda Castle Google Map

Gassantoda Castle Images 

"Must-visit spot for Yamashiro lovers"

It was the castle of Amago Clan, the Daimyo of Sengoku Period, but was destroyed by Mori Clan. Then Horio Yoshiharu , who was enclosed after the Battle of Sekigahara, changed to a modern castle. It is said to be the most impregnable fortress castle using natural terrain, also called "Castle in the Sky", because of never fallen down before.
A main section near the summit, and stone wall of Honmaru, Ninomaru and Sannomaru constructed by the method of stacking low stone wall gradually. Sannomaru seems to have a structure in which the circumference of Ninomaru, wrapped around like a band.
Stone wall Excavated

The presence of moss on the surface of the stone can be used to determine whether it is alive or rebuilt or buried.
the memorial of Yamanaka Shikanosuke

The location of the castle is a bit difficult to access, but the stone walls seen in the ruins of the palace emotionally are worth a looking.

Link : Japanese five most especially famous mountaintop castle

【west japan】Kannonji Castle 【west japan】Odani Castle 【central japan】Nanao Castle 【north japan】Kasugayama Castle 【west japan】Gassantoda Castle


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