Because of the extent in technical structure of Henkado , there are sub – classes naming individual combats and shiay Do.

In individual combats which is used for military and police forces , High level self defense , detention , disarmament , Jumping from barriers , and using cold weapons trainings such as : Nanchako , sai and 3 and 5 seconds leaps are training , which this training will be accomplished into a 4-6 months course , the trainees will be awarded certificate . The second sub – class of Henkado defensive martial art are free and inter – style competitions named shiay Do.

Shiay Do competitions execute in frame work of specified regulations for Henkado.

In fact shiay Do is connection bridge between styles using launching techniques and joints lock such as : Judo , Jojitso , Aikido , Hapkido and the other similar styles.

Shiay Do competitions execute on Tatami with dimension 8×8 , which in these competitions using from foot and hand knocks are forbidden. Participating in these styles which was pointed out , with uniform special to the related style is free and the sleeves shouldn’t be too short , 10 cm upper than wrist is legal but overly short sleeves results to preventing from entrance of competitioner into Tatami.

Shiay Do is a substantial action which along friendly relationship between tatami styles , is using their similar techniques .

Shiay Do competitions performs in 2 age categories of juveniles and adults and in two section of men and woman into 9 weights in each section .

A friendly combat

A permanent Relationship

This is the philosophy of shiay Do.