Libronix had a reverse interlinear of the Japanese bible (see: http://www.bible.or.jp/purchase/newbible/greece.html). It is no longer available through Logos. Japan is the single largest unreached people group in the world with less than 1% of the population professing faith. (Yes, China and India have larger populations, but they are made up of a diverse range of people groups.) It might not be profitable for Logos to focus on this, but it would certainly help those of us who are involved in partnering in missions with our brethren in Japan.
johan le commented
There is already one in Pre-pub.