What's this Kanji?

[soudou]

Wait a minute. when you say ''please'' in japanese, is it ''Onegaishimasu''? Or is it ''kudasai''?

As far as I can tell "Onegaishimasu" is more formal. One example I've seen that fits ErnieYoung's "praying" analogy is when people say "Onegaishimasu" whilst clasping their hands on TV when the results of a contest is about to be announced, as if to say "please please let me win". Here's some discussion from a quick Google with people discussing when to use onegaishimasu vs kudasai.
http://japanese.stackexchange.com/questions/269

I think 'bet' came out because bet is 賭け(kake) in Japanese.

Ah yeah, makes sense since they sound the same! That's how all those word puns start

[VideogameDC]

Wait a minute. when you say ''please'' in japanese, is it ''Onegaishimasu''? Or is it ''kudasai''?

As far as I can tell "Onegaishimasu" is more formal. One example I've seen that fits ErnieYoung's "praying" analogy is when people say "Onegaishimasu" whilst clasping their hands on TV when the results of a contest is about to be announced, as if to say "please please let me win". Here's some discussion from a quick Google with people discussing when to use onegaishimasu vs kudasai.
http://japanese.stackexchange.com/questions/269

Thanks soudou.

[beesan]

"Onegaishimasu" is used more often in very polite/formal situations, like "if you would be so kind" or "if you could please" when asking for something.

Generally I use this more often than "kudasai". If you are being more direct with someone or giving an instruction, perhaps if you are a teacher talking to a student, you would use "kudasai".