Giant Heroine Sigma Lady stars �Yu Kawakami� as Kamishiro: the only female member of the Earth�'s Defense Force, who is in fact Sigma Lady, a superheroine who has come from outer space to protect the peace of the world. One day she visits Cosmo Tower which is in the direct path of the monsters invading Tokyo�'s huge 620 meter-high tower, equipped with a device to launch an electromagnetic net on any incoming intruders to Metropolis. Meanwhile the Mikarus (an evil alien organization) decide to attack the city from the inside by kidnapping Kamishiro and cloning her, now Sigma Lady's clone is destroying the city and she has to tackle her worst enemy: Herself.

And the first thing I liked about this film (as you can tell from the convoluted intro) is how plot-driven it starts out. To the extend of possibly boring some heroine-film-fans, but for me it was a blast to see a porn film so driven by dialogue and genuine science-fiction (without showing a lot of it for a while too).

Another thing I really loved about this film is the direction. Giving even more respectability to these opening dialogue scenes with simple, yet professional shots and scene-composition that gets you drawn in even more to the events, and for what's to come.

The special effects are also great and the direction seamlessly transitions from the miniature work to the real-life shots, but also mixes the great practical effects (Creatures, Cities) with the CGI effects too. Making everything feel incredibly fluid and not distractingly out of place at all.

And the creature fights themselves are very well done, and are supported by great choreography and fantastic sound design that mixed with the already solid direction makes you feel every hit each opponent takes.

And as the direction does become more provocative, It is still very modest and respectable, yet just as powerful as more overt porn direction. In the spellbinding first sex scene the director is able to get so many creative and magnificent angles without ever feeling flashy, and only adding to the scenes already claustrophobic feel.

The costumes are great as usual, while the creatures are OK. Sigma Lady�'s costumes are fantastic, the first one being her earth costume which is a white-and-black leather and spandex catsuit that compliments Yu�fs body well enough, but isn't as shiny or as skin-tight as her battle costume which is a silver, white and red catsuit that absolutely clings to Yu's already ample body, and is just a marvel to look at throughout.

I guess one problem I had with the first fight scene is how obligatory it was, really serving no purpose other than to fill time. One could argue that the giant battle was to weaken her to then grow small again and knocked out by one of the Mikarus, but it just seems like he would've done it anyway.

But one thing I really like about the second fight scene is how even though the actresses are both wearing the exact same costume, we can still differentiate between the good Sigma Lady and the bad one. Which all relies on the performances of the actresses, and their little mannerisms & ticks that show who's good and who�'s bad, but another factor that helps this is again the direction that with the simple low-angle and high-angle motif shows this very expertly.

The electricity-net moment is ingenious, although small (and the last of my positives), it is set up a lot earlier in the film, and is paid off perfectly, plus just seeing our heroine wrapped up in those nets, helpless as they electrocute her senselessly before being beaten is beyond titillating.

And now for the negatives, the main one being the voice acting (or shall I say voice inflections). During the fights it grows very tiresome after a while. Repeating the same couple loops of grunts over-and-over it almost amplifies the already tedious at times fights, which otherwise are good in their own rights.

Sadly the end sex scene was my last tether with the film. Being very painstaking and overly drawn-out, it has maybe only three or four shot changes throughout this ten-minute sequence, and feels like watching paint dry at the best of times. Another problem I have with this scene is that a prosthetic is used instead of the real thing, which is strange because there was an unsimulated sex scene earlier, and that worked out great, but this makes the scene feel completely awkward and forced.

Another problem I have with the film is that it relies too heavily on the monster fights. To the point that I'm sitting here writing a review, and have no clue what to say about the performances and writing because they're basically non-existent as they're given no screen time whatsoever, or at least not enough for me to comment on them.