This is not a linguistic forum and I'm not not a linguist but I read on several credible academic sources that, "Japanese as an Altaic language" theory is proven in mid 2000's, even though it was heavily criticised in 90's.
And I can personally say that modern Turkish and Japanese languages have exactly the same grammar and sentence construction. And that makes it very easy to learn Turks to learn Japanese, vice versa. Basically you only need to learn the words.
Even if, none of it is true; still, phonetically, Turkish word kama is read exactly like Japanese "kama", whatever the reason.
