に関(かん)してRelated to, About, Regarding

Both patterns mean 'about (A)' or 'concerning (A)' and show a relationship between (A) and the following phrase, but with some differences. について is neutral in formality and attaches to verb phrases, e.g. 歴史について学ぶ ('Learn about history'), while に関する・に関して is somewhat more formal and can modify verbs (in に関して form) or nouns directly, e.g. 歴史に関する本 ('A book about history'), which について cannot do.

Both express the idea of connection, but differ in usage and nuance. に関する・に関して attaches to nouns to mean 'about (A)' or 'regarding (A)', e.g. 歴史に関する本 ('a book about history') or 歴史に関して勉強する ('study about history'). 関係がある conveys a looser connection, meaning 'is related to (A)', and unlike に関する・に関して, can be used with と as well as に, in sentence-final position, or with ない to express a lack of connection.

Both follow nouns to express the idea of being related to or having to do with something, but they differ in nuance and structure. に関する・に関して attaches to a noun to mean 'about (A)' or 'concerning (A)', e.g. 歴史に関する本 ('a book about history'). にかかわる also connects to nouns but often implies a more serious or impactful relationship, e.g. 命にかかわる問題 ('a life-threatening issue').

Both show a relationship, but differ in nuance. に関する・に関して means 'about/concerning (A)' and attaches to nouns, e.g. 歴史に関する本 ('a book about history') or 歴史に関して書く ('write about history'). In contrast, にかけては means 'when it comes to (A)' and highlights strength or excellence in an area, e.g. 料理にかけては彼が一番だ ('When it comes to cooking, he's the best').

These patterns are similar in that both follow nouns, then attach to either another noun (に関する and における) or the rest of the sentence (に関して or において), but differ in meaning. に関する・に関して means 'about (A)' or 'concerning (A)', while において・における can be considered a more formal/literary equivalent of で indicating a context, place, or setting.

These phrases are similar in that both can be translated as 'about (A)' or 'concerning (A)', but they differ in nuance. に関する・に関して is a more neutral and general-purpose expression that can be used to express 'about (A)' in a wide variety of contexts, while を巡って is more formal and often implies differing opinions or viewpoints surrounding a topic, and is therefore used more narrowly.

Both patterns show a relationship, but differ in nuance and usage. に関する・に関して attaches to a noun to mean 'about (A)' or 'concerning (A)', e.g. 歴史に関する本 ('a book about history'). In contrast, に対して (or に対する before nouns) implies a directional or oppositional relationship like 'toward (A)', e.g. 彼に対する気持ち ('feelings toward him').