That's because I used Google Translate to look up hexadecimal in Japanese and went with the pronunciation that it gave me.
I edited the Japanese name to make the pronunciation match up (it conveniently also gives a somewhat accurate description when compared to Tenjiku Shogi). However, truth be told, most non-Japanese people probably won't care what the Japanese name is, as long as it is consistent.
That's because I used Google Translate to look up hexadecimal in Japanese and went with the pronunciation that it gave me.
I edited the Japanese name to make the pronunciation match up (it conveniently also gives a somewhat accurate description when compared to Tenjiku Shogi). However, truth be told, most non-Japanese people probably won't care what the Japanese name is, as long as it is consistent.