Japanese phrase
___はどこまで必要ですか？ ___ wa do ko ma de hitsu yō de su ka
Meaning
How much of ___ is needed?
When to use it
A polite question about the amount or extent required. It is useful when the necessary limit is unclear in a work or service setting.
Example dialogue
資料はどこまで必要ですか？ shi ryō wa do ko ma de hitsu yō de su ka
How much of the material is needed?
要点だけで大丈夫です。 yō ten da ke de dai jō bu de su
Just the key points are enough.