1. ~を問わず (Regardless of / Without regard to...)
Meaning: Not calling into question, not requiring, or demanding a certain aspect. (It is the same regardless).
✓ Often accompanies words implying a wide range or degree (such as 年齢 - age, 国籍 - nationality, 天候 - weather...) and words indicating opposites (such as 男女 - men and women, 内外 - inside and outside, 有無 - existence or non-existence).
2. ~にかかわりなく / ~にかかわらず (Regardless of / Irrespective of...)
Interrogative word + か + にかかわりなく / にかかわらず
Meaning: Irrespective of that aspect; whatever the first clause is, the second clause remains unchanged (the same).
✓ Used with words implying varying degrees or sizes (such as 距離 - distance, 金額 - amount of money, 大きさ - size...).
✓ Can also be used with contrasting pairs (like going/not going, many/not many), or with interrogative words followed by 〜か.
3. ~もかまわず (Without caring about / Disregarding...)
* Na-adjective だ -> な / Noun N だ -> である
Meaning: Ignoring or not caring about situation 1, and continuing with action 2 regardless.
✓ Derived from the verb 構う (かまう), which means to mind or care about.
✓ The second clause expresses an unusual or unexpected action (it does not express the speaker's volition or desire).
4. ~はともかく(として) (Leaving aside / Let alone...)
Plain form + のはともかく(として)
* Na-adjective だ -> な / Noun N だ -> な
Meaning: Setting aside A for now, to talk about B. (Because B is the more important thing to emphasize).
✓ Compared to the latter clause, the part preceding "はともかく" can be temporarily ignored because it is not as important.
✓ Often used with question words followed by 〜か (indicating doubt/question).
5. ~はさておき (Setting aside... for now)
Meaning: Since there is a more important issue to prioritize, let's set aside this topic for now.
✓ The second clause often contains the most important matter or the main topic.
✓ Frequently combined with question words followed by 〜か.
✓ The latter clause is given higher priority than the preceding one, representing the fundamental thing that needs to be addressed first.