It is a special order to Takami Tanzo (Chiyozuru style Rentetsu (wrought iron) / White I steel blade Kamisori
Chiyozuru means Chiyozuru Korehide who is the one of the most famous and admired carpentry cutlery blacksmith in last century.
His cutleries are mostly seen in museums.
I asked to Mr. Amano (Takami Tanzo co.) several years ago to make one kamisori like he made.
It has been over years, and finally, he made one like this for me.
It is kind of large size kamisori, but it is extremely brilliant look.
Kamisori and straight razor are different things, but some Japanese straight raozrs and Iwasaki Kamisori have single bevel kamisori style straight razors.
I have seen those mixed razors in Tosho, and Tomobo, and some other makers.
I have also seen the same style in Iwasaki razors sometimes, but I was not sure what they had made by Iwasaki or someone else had modified it from original kamisori.
However, I saw the same style blade recently in new condition, and I saw the same style blades at Iwasaki factory, so they had made by Iwasaki (single bevel kamsori with straight razor shank and tang).
I have seen thousands of Japanese straight razors that are mostly made before 1980, because those Japanese straight razor makers had closed their business decades ago.
They have lots of variety, lots of makers, and lots of questions, because we do not have any collector's guide book or researchers to teach us.
This straight razor is probably what I have never seen before, and it looks high quality razor, and it is used the steel from foreign country on purpose.
It is also hardly seen the blue half transparent scale.