Katsumoto,
I've had good luck creating hamon lines in 1095 using a hybrid method. Coat with clay as normal, I heat to mid/upper critical- a shade brighter than non magnetic, and quench in 120 degree canola oil ( rape seed oil ) , Temper - well that depends on the size of the blade and application 375f - 475 f . One thing to keep in mind is the sori or curvature caused by quenching is backwards in the oil , instead of curving up it curves down. I've been experimenting more with water quenching , but still crash allot of blades , with a Oil quench I have better than 90% success rate, with water it's , 40 % if I'm LUCKY !
Thomas has it quite right , if you want to water quench start with some 1050 or 1065 or be prepared for lots of warps and cracks ...
Best of Luck !
Jens