ひたすら・只管・一向・頓hitasura[0]heiban (flat)

1. adverb, na-adjectiveintently; single-mindedly; devotedly; solely; earnestly; with all one's heart
   彼かれはひたすら成功せいこうを望のぞんで懸命けんめいに働はたらく。↗

   He works hard because he is anxious to succeed.

• Synonym一途いちずNeutralA na-adjective for sticking to one chosen path, as in 「一途な恋」 or 「研究一途」; used of feelings, careers, and goals.
• Synonym夢中むちゅうNeutralBeing absorbed or obsessed, as in 「ゲームに夢中」; the point is forgetting everything else, while the headword stresses doing only one thing.
• Synonym一心不乱いっしんふらんNeutralA four-character idiom for undistracted concentration, as in 「一心不乱に祈る」; it stresses undivided attention and is more solemn than the headword.
• Synonym一筋ひとすじNeutralDevotion to one pursuit over the long term, as in 「この道一筋」 or 「仕事一筋」; it also means a single strand or line.
• Synonym一にいつにWrittenWritten/formal prose meaning entirely or solely, as in 「一に努力による」; it attributes a result wholly to one cause, not to concentrating on a task.
• SynonymひたむきNeutralA na-adjective for an earnest, devoted attitude, as in 「ひたむきな努力」; the headword is mostly an adverb modifying an action.

Use 「ひたすら」 for doing only one thing, persistently, as in 「ひたすら謝る」. For an earnest, devoted attitude say 「ひたむき」; for sticking to one path, 「一途」; for being absorbed, 「夢中」.

Usage comparisons are AI-assisted and cross-checked by multiple models; for study reference only

1. （しかん:宋代そうだいの中国語ちゅうごくごより）ひたすら、～だけをする。