The Shinsengumi, or 'New Chosen Ones Group', was a highly trained sort of military police force at the service of the Tokugawa Shogunate regime in 19th Century Japan, a time of ebullition because of the clash between tradition and modernity that resulted from U.S. Commodore Mathew Perry's visits in 1853.
Originally formed with masterless samurais (ronin), the Shinsengumi soon gained a reputation of ferocity in combat. They where even known as the Wolves of Midu, because of the central suburb of Kyoto, the ancient Japanese capital, where they were stationed.
Using colorful uniforms to intimidate the enemy, the Shinsengumi followed the code of the Samurai, which put honor above anything else. However, there was a strong distinction with the strict cast rule of the Samurai: the Shinsengumi allowed everybody willing to be trained to join their ranks, regardless of class origin.
One of the distinctive symbols they used was the serrated design ('Mountain Stripes') of their flag, reproduced also on the sleeves of their robes. They were a popular sight in the streets of nineteenth century Kyoto.
The Shinsengumi were dissolved after the death of their leader in 1869.
They are considered the last expression of the Samurai in Japan.
Casio has given tribute to Samurai history in this 25th Anniversary of G-Shock with 2 models so far, a splendid DW6900 and this DW55600VTSSK-1TJR (the largest model code I've seen for a G-Shock ever).
Since Sjors and DragonJade posted the news about the release of this 5600, I liked the simplicity of the design, the Japanese characters on the display and the black-orange red color.