What it means
いかんによらず means that a result, decision, or treatment remains unchanged regardless of the circumstances, conditions, or details represented by the preceding noun. It is a highly formal and written expression, commonly used in regulations, official notices, contracts, and academic or business prose. The usual pattern is a noun followed by のいかんによらず.
Usage note
いかんによらず normally follows an abstract or evaluative noun, such as 年齢, 理由, 結果, or事情, and is not a casual replacement for ordinary expressions such as にかかわらず. The construction is often written as Nのいかんによらず; omitting の occurs in some formal compounds but should not be treated as the default pattern.
How to use it
申請者は、年齢のいかんによらず、審査の対象となります。
An applicant is subject to review regardless of age.
申請者は、年齢のいかんによらず、審査の対象となる。
An applicant is subject to review regardless of age.