お～願(ねが)うPlease, Could you please

お～願(ねが)う is a humble speech expression in Japanese used for making requests in the same way as お～ください 'please do (A)'. As with many other polite structures, the use of お will primarily appear with words of Japanese origin, while ご will be used for the majority Chinese-origin kanji compounds.

願(ねが)う itself is a う-Verb meaning 'to petition', and the literal translation is something like 'I petition that you do (A) for me', which sounds incredibly stiff in English, but gets the point across that someone is doing a favor for you.

Naturally, due to being a polite sentence pattern, お～願(ねが)う will almost always appear in it's ます-form, お～願(ねが)います.

Interestingly, words of western origin, such as katakana loanwords, will often omit both お and ご, appearing simply with 願(ねが)う attached to the end.

Caution

As お～願(ねが)う is an even more polite way of saying お～ください, or simply even just てください, it will rarely be used outside of formal circumstances, such as voice-overs giving instructions etc. If used in daily speech, it may come across as sarcasm.