Watching it, like I've watched a lot of low-budget, zany Japanese films hoping to find more than one that's awesome. I guess if you like your movies to be really boring and bland while having a concept that could have been executed 1000x better, go for it.
I mean this film is about Ninjas vs an alien. There is no reason for this to be boring at all. And wow, if you see a ninja with blond hair in the trailer believe me when I say that you'll want to stab him in the face every time he talks.
Seriously, they've been sitting and talking for like 6 minutes. You have the leader, the whiner, the cocky arrogant guy who's all "We're ninjas, we don't run from anything," a girl....and some village kid they saved or something. And they just tried to be funny and it was painful. Avoid this.