Why does Japan call the Book of Genesis by the wrong name?

The Hebrew name of the first book of The Bible is Bereshit which is also the first word of the Hebrew text "In The Beginning".

The Greek name is the basis for the Latin name which is the basis for the English name Genesis and it also meaning Beginning in a sense. 

Now one could critique that Greek as not the most direct Greek equivalent to the Hebrew word as both languages had other words for beginning. But the gist is both are words that identify the book as the start of something.

My prior posts on this blog where I say what Japanese words I would use to translate certain Biblical Hebrew or Greek words are largely being tun in cheek, I haven't even looked into if those are existing Japanese Bibles do, in some cases I find unlikely but in others decently likely. 

But I felt compelled recently to learn what the Japanese name for the Book of Genesis is  創世記 (pronounced Sōseiki) which means "Chronicle of the Creation of The World".  A not unfitting name for the the early part of the Book, but less fitting once the focus narrows to being about the Patriarchs of Israel, that narrative is still a Beginning, the Beginning of Israel, but it's not a record of the entire world anymore. 

And it's certainly a translations of the name of the Book the Portuguese Catholics were using in the 16th Century which is another variation of Genesis. 

However once Ancient Bible that does a Genesis a name that feel equivalent to that Japanese name is the Aramaiac Peshita ܣܦܪܐ ܕܒܪܝܬܐ (Sēp̄rā d-Bərīṯā) – meaning "Book of Creation" (derived from the Aramaic word for creation/formation, brīṯā).

I've long had an interest in the theory that Oriental orthodox of "Nestorian" Christina might have came to Japan in late antiquity or the early middle ages. But usually that theory still doesn't imagine any continuity between that Community and the contemporary Christians of Japan. But it turns out the Japanese call Genesis a name that makes more sense as a translation of one of it's Syraic names then it's European Catholic name. 

Hajime is a Japanese girl's name that means Begining, I know this because of the lore of Overflow Visual novels that have been localized into English, Hajime Inou was the first born daughter of Kagura Inou. 

So I think a better Japanese name for the Book of Genesis is Hajime.