At a glance
～を問わず means "regardless of" or "no matter what the ~ is". It shows that differences in something (age, gender, weather, time) make no difference to what follows. It is mostly used in writing and formal announcements.
Noun + を問わず、～
国籍を問わず、誰でも参加できます。 Anyone can take part, regardless of nationality.
How to form it
を問わず is an expression. It attaches to nouns and to clauses ending in かどうか.
| Attaches to | Example | Meaning |
|---|---|---|
| Noun with a range of values | 年齢を問わず | regardless of age |
| Noun made of a pair | 男女を問わず | regardless of gender |
| Noun + の有無 | 経験の有無を問わず | regardless of whether there is experience |
| Clause + かどうか | 経験があるかどうかを問わず | whether or not someone has experience |
Register: formal, mostly written.