Technical term for mixed notare/suguha hamon?

[Lewis B]

Posted this query in another thread but maybe the right eyeballs didn't catch it. It was referring to the style of hamon that blended notare and suguha hamon styles. I read the samurai of the time valued this style of hamon.

 

https://www.samurai-nippon.net/SHOP/V-2153.html

 

 

There is a technical term for the style of hamon that transitions from notare in the central section to more suguha style in the monouchi that eludes me. As I understand it this was the intent of the smith for practical reasons and was a ferature prized by the samurai of the time, as it strengthens the area of the blade that is more likely to contact the opponents blade. 

And how did the smith achieve this effect? Is it simply a differential hardening exercise using different clay applications?

What is the name given to this style of hamon that appeared popular during the Kamakura era and especially noteworthy in Bizen swords. 

[Jacques]

Hamon, is choji midare mixed with gunome (look at oshigata). As i always say we see nothing on pictures only the hadori.