Update!

I maked a kamisori and everything was perfect. The grindig was difficult as Bruno said. I am pleased with the results. I got fine and sharp edge. Thank you for your help!

My process:
I leaved 1.5 mm thikness of the edge.
soaking: 805C / 1480F, 8 min.
quenching oil: 80C 20 sec - Thanks Maximilian
tempering: after cooling to room temperature, 210C 2x1h (between cooling to room temperature)
After this I sanded a few tenths of millimeters from the edge.

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