Some guy takes them to exploit them and they're singing voices. A bit later when the Peanut sisters sing it awaking's Mothra which appears about halfway though the movie.
I mostly watched this for the Mothera song which sounds pretty peaceful and beautiful. Also when Mothra finally cocoons into a butterfly or moth it really gets good. If your a monster movie fan check this one out since it's considered a classic Sci-Fi monster movie.
This movie has enough going on that it is interesting to see, even if you will find that the plot is familiar to aficionados of the Kaiju genre. First of all, we get two monsters for the price of one here, Mothra in her larva stage and in her adult stage. Both forms are quite different from each other and have very different ways of destroying Tokyo. The larva is a large, crawling creature that destroys buildings (including Tokyo Tower) by slamming into them and crushing everything under its weight, while the adult Mothra flies above the city, creating hurricane winds that tear buildings apart and send anything that isn't firmly tied down flying and crashing into anyone caught in its path. Like any good monster movie, you also find yourself cheering for it, just a little bit. Mothra isn't some rampaging monster, it's a vengeful god sent to rescue its apostles, two young women who have been kidnapped and forced to perform tricks at the request of audiences. It becomes not so much a "What weapon will they find to take Mothra down?" story as it is a "how can our heroes rescue the Shobijin and save the day?". That aspect of the film is actually one of its biggest strength. In many monster movies, the human plot just feels like filler. Something to introduce the monster and then tie together the various sequences of destruction before the solution is discovered. Not here. The human characters are actually integral to the plot. They are the ones who discover the Shobijin (and in the case of Chujo, he's the one who names them) and they are the only ones who are able to free them and hopefully save the city. You see, there's a whole other aspect to the film that ties into the kidnapping, which is the relationship between Japan and Roliscia. They're two countries that are working together for the common good of studying radiation poisoning and nuclear testing damage, but when the actions of Nelson brings destruction to Japan, everyone is at a loss as to what to do. He's a foreigner and actions against him could lead to a declaration of war between the two countries. From his point of view, Nelson does not see his actions as wrong and it is only when Mothra begins attacking that he realizes what he has done. He doesn't release the small beauties though because he's just hoping that the military will take care of Mothra. Letting them go would only acknowledge his part in the attack anyway and create an international incident. So overall there's a lot going on with the monsters and the humans. You've actually got some pretty interesting characters featured inbetween the scenes of monster action.
Speaking of monster action/special effects, how do those look? Well, one thing that needs to be mentioned is that there's one recurring special effect that's not convincing at all and is in fact pretty badly done, the Shobijin. When they use camera tricks to make the female actresses look tiny, it's terrific but there are several sequences where they are clearly dolls being handled by the actors and it's actually pretty laughable. Aside from that, the special effects are pretty sweet. There's something about Mothra that makes her oddly compelling. A giant caterpillar and a giant moth wrecking a city? That's something you've never seen before, that's for sure. The puppets used for Mothra are quite convincing (the strings are well hidden and I think the caterpillar is mechanized) and as usual, the miniatures and sets that are to be destroyed are quite good. They actually look better than they have in the previous films in Toho's Kaiju universe and it's all in colour. There are some pretty iconic scenes of destruction, particularly when it comes to the Mothra larval stage, when it attacks Tokyo tower and like I said before, it isn't all just buildings falling down and being crushed, with the sequences of Mothra flapping her wings and destroying the city, it's something you haven't seen before.
"Mothra" is actual a very compelling monster movie that puts enough twists on the formula to make it feel like its own thing. The characters and the monster are interesting, the plots are cleverly interwoven into each other and the special effects are good too. Best of all, it leads into one of the most fun films in the Godzilla series, "Godzilla vs. Mothra". It isn't only for fans of Kaiju movies, it's the kind of film that stands on its own and that you use to introduce people to the genre because it is legitimately good on its own, or as part of a series. (On Dvd, March 29, 2014)