Lyric discussion by ExtremistModerate 

Cover art for Party Poison lyrics by My Chemical Romance

The Japanese parts are translated as follows:

Minna! Kuruma wa mantan dashi Su-tsuke-su (suitcase) ni wa bakudan tsumete-iru Jinsei wa mijikakute, iku michi wa kiken ga o-oi Dakara odorou

"Everybody! The car is filled with gasoline. The suitcase is filled with bombs. Life is short, and the way to[i.e. future] has a lot of danger. So, let's dance!"

Yuumei ni naritai no Majide E-n to ikitai Watashi wa bakuhatsu suru

"You wanna be famous? Seriously? I wanna keep going forever. I'm gonna explode!" (Interestingly, 爆発する"bakuhatsu suru" is my favorite Japanese verb ever)

So when the party gets out Minna de odorou Till the party breaks down Karada ga itaku naru made Now everybody get down Minna de odorou Now everybody get down Karada ga itaku naru made Till the party breaks down tonight Karada ga itaku naru made Karada ga itaku naru made

"So when the party gets out. Let's dance together. Till the party breaks down. Till the body hurts. Now everybody get down. Let's dance together. Now everybody get down. Till the body hurts. Till the party breaks down tonight. Till the body hurts. Till the body hurts."

Hope that helps!

Translation