Stranger from another planet.
According to this, the movie is being released on June 30th, but I've heard rumours it may get a 2-day earlier release. A good sign or a bad omen? Who cares, I wanna see it soon. According to the "Movix" website, Superman is nowhere to be seen.
For some ungodly reason, one can never depend on release dates in Japan. X-men3 which debuted last month everywhere in the world except Japan, has yet to surface, even in poster form. And they wonder why so many movies get pirated illegally.
Just for interests' sake, here is the kanji for Superman (Choujin) 超人