How to say "Earnest" in Japanese

When translating "earnest" into Japanese, you must choose carefully between 嘆願 and 懇願. In Japanese, 嘆願 (たんがん (tangan)) is typically associated with "earnest request, petition, appeal" (Syllabus Level: N2) and represents Often used in formal or serious contexts when making a strong plea or request to an authority or organization.. On the other hand, 懇願 (こんがん (kongan)) maps to "earnest request, entreaty, supplication" (Syllabus Level: N1) and represents Often used when making a strong, desperate, or humble request, sometimes implying a plea for mercy or help. Can be used in formal or literary contexts, or when emphasizing the earnestness of a request.. A literal translation of "earnest" can often sound unnatural to native Japanese speakers if mixed up!