As far back as the seventh century Japan warriors wore a form of lamellar armor , this armor eventually evolved into the armor worn by the samurai. The use of armor in japan ended complete by the 1870's as the last samurai rebellion was crushed and Japan modernized it's countries defenses and turned to a national conscription army which used uniforms.

A serious became popular due to the advent of fire arms, new fighting tactics and the need for additional protection.

A series of stripes of kozane were then laced together with silk of leather lace and formed into a complete chest armor dou or do.

Samurai armor changed and developed as the methods of samurai warfare changed over the centuries.

*lamellar-noting a type of armor composed of small plates of lames laced together.
*rebellion-resistance to or defiance of any authority, control, or tradition.

http://en.wikipedia.org/wiki/Samurai