I did a search, and the latest message I found in the forum was dated 2011. I know many have asked for this since then as well. I even wrote the CEO.
It seems really odd that Logos wants to remain the leading Bible Software in the world, but has not provided this. It seems with all this cutting edge tech, providing this would be a given.
I like Logos a lot. I've been using it for YEARS, (I used Libronix also), yet, I must say I am very disappointed a Japanese Version with Furigana is not offered.
Come on Logos, you are better than this!
-John