“〜ni yonen ga nai”: To Be Absorbed In / Devote Oneself Fully To [JLPT N1]

Content by NTJ Kuma · Nihongo to Japan editorial team · Updated July 27, 2026

Completely focused on something, with no other thoughts

「選手は練習に余念がない」 — single-mindedly, tirelessly absorbed

An article describes someone wholly devoted to something — 「代表選手は、日々の練習に余念がない (the national athletes are tirelessly devoted to daily practice).」 「〜に余念がない」 = be wholly absorbed in ～, tirelessly devoted to ～. It's a written, admiring expression, putting all one's mind into one thing. This guide clarifies its core of “single-minded ＋ admiring diligence,” the particle 「に,」 and separating it from the colloquial 「夢中だ.」

Core: wholly absorbed, tirelessly devoted to (with admiration)

「noun ＋ に余念がない」 means “be wholly absorbed in ～, tirelessly devoted to ～” — putting all one's mind into one thing, focused, diligent, undistracted:

• 職人は、技を磨くことに余念がない (the artisan is tirelessly devoted to honing his skill).
• 学者は、長年その研究に余念がなかった (the scholar was, for years, wholly absorbed in that research).
• 彼女は、出発前の準備に余念がない (she is wholly absorbed in the pre-departure preparations).

Feel: 「余念」 = “other thoughts, distractions,” 「余念がない」 = “no other thoughts (= single-minded).” The core is “single-mindedly, devotedly absorbed in something,” with an admiring, positive color — mostly for describing someone else's diligence, focused devotion (an athlete's practice, a scholar's research, an artisan's craft), solemn in tone, common in reports, criticism, essays. In English: “be wholly absorbed in, tirelessly devoted to, immersed in.”

Attachment rules

Examples in use

• 開店に向けて、店主は仕込みに余念がない。(Toward the opening, the owner is wholly absorbed in the prep work.)
• 受験生は、追い込みの勉強に余念がない。(The examinee is tirelessly devoted to the final-push studying.)
• 職人たちは、伝統の技を守ることに余念がない。(The artisans are single-mindedly devoted to preserving traditional skills.)
• 彼は新製品の開発に余念がない様子だ。(He seems wholly absorbed in developing the new product.)
• 母は、正月の準備に余念がなかった。(Mother was wholly absorbed in the New Year preparations.)

⚠️ Easy traps to avoid

① ⭐The particle is 「に,」 not 「を.」 This is the most common attachment error. The noun before 「余念がない」 takes the particle 「に」 — 練習に余念がない (○), 研究に余念がない (○), not 「練習を余念がない」 (×). Because 「余念がない」 literally is “(toward ～) has no other thoughts,” that object is marked with 「に.」 Test: 「〜に余念がない,」 the preceding noun (練習／研究／準備) always takes 「に.」

② The core is ‘single-minded ＋ admiring diligence,' mostly for positively describing others' devotion. This is 「に余念がない」's feel-point. 「余念」 = distractions, other thoughts; 「余念がない」 = no distractions = single-minded, wholehearted. It carries a clear admiring, positive color, mostly for describing someone else (an athlete, scholar, artisan, owner) diligently, devotedly absorbed in something, solemn in tone: 選手は練習に余念がない (the athlete is tirelessly devoted to practice — admiring the diligence). It's complimentary, not for the negative or disparaging. Test: to admiringly describe “(someone) wholly, tirelessly absorbed in ～” → に余念がない (complimentary, written).

③ It's a written, solemn expression; for colloquial ‘engrossed, hooked' use 「夢中だ.」 This is a register reminder. 「に余念がない」 is a written, solemn expression with an admiring-diligence feel, common in reports, criticism, essays. For colloquial “(someone) is really into, engrossed in, hooked on ～,” 「〜に夢中だ」「〜に熱中している」「〜にはまっている」 are more common, not 「に余念がない」 (forcing it colloquially sounds stiff). Test: to admire in writing “tirelessly devoted” → に余念がない; to colloquially say “engrossed, hooked, really into” → 夢中だ／熱中している.

④ Separate it from 「に夢中だ」 — に余念がない leans ‘diligent focus (complimentary, written),' に夢中だ leans ‘engrossed (neutral, colloquial).' Both express “absorbed devotion,” but differ in feel and register. 「〜に余念がない」 = tirelessly devoted to (complimentary, written, solemn): 職人は技を磨くことに余念がない (the artisan is tirelessly devoted to honing his skill — admiring the diligence). It leans diligence, effort, positive devotion, a written compliment. 「〜に夢中だ」 = engrossed in, hooked on (neutral-leaning-colloquial, stressing absorption): 子供はゲームに夢中だ (the child is engrossed in games — neutral or even negative), 彼は釣りに夢中だ (he's hooked on fishing). It leans fascination, absorption, neutral, colloquial, positive or negative. Difference: 「に余念がない」 leans diligent, effortful focus (complimentary, written, mostly admiring others' devotion); 「に夢中だ」 leans engrossment, fascination (neutral, colloquial, positive or negative). Test: to admire in writing “tirelessly devoted, diligently focused” → に余念がない; to colloquially say “engrossed, hooked, fascinated” → に夢中だ.

🔄 Compare: に余念がない／に夢中だ／に専念する／に打ち込む

💡 Learning tip

「〜に余念がない」 = be wholly absorbed in ～, tirelessly devoted to ～ — three points: ①⭐the particle is 「に」 (練習に余念がない, not を); ② the core is “single-minded ＋ admiring diligence” — 「余念」 = distractions, 「余念がない」 = no distractions, single-minded, a complimentary, written expression, mostly to admire others (athletes／scholars／artisans) for diligent devotion; ③ separate it from the colloquial 「に夢中だ (engrossed, fascinated, neutral colloquial)」. This is an elegant praise-of-diligence phrase — 「選手は練習に余念がない」「職人は技を磨くことに余念がない」 render that single-minded, tireless immersion solemnly. To admire someone's focused devotion in writing use 「に余念がない」; for colloquial “(someone) is engrossed, hooked” use 「夢中だ.」

❓ FAQ

Q: What does the 「余念」 of 「余念がない」 mean? Why does “no 余念” = “focused”?

「余念（よねん）」 = “other thoughts, distractions, wandering thoughts.” 「余念がない」 = “no other thoughts” = “single-minded, wholehearted.” The logic: if someone has “no other thoughts (余念がない)” toward one thing, it means they've put all their mind into it, single-mindedly, devotedly absorbed, hence extended to “wholly absorbed in, tirelessly devoted to ～.” So 「練習に余念がない」 = “(toward practice) no other thoughts = single-mindedly immersed in practice = tirelessly practicing.” It's a complimentary expression, mostly describing someone's diligent, focused devotion to something. Its structure is “［something］に余念がない” (no distractions toward something = focused on something), particle 「に.」 Test: on seeing 「〜に余念がない,」 read it as the admiration “single-mindedly, tirelessly absorbed in (～).”

Q: What's the difference between 「練習に余念がない」 and 「練習に夢中だ」?

The difference is ‘feel (complimentary vs neutral)' and ‘register (written vs colloquial).' 「〜に余念がない」 = tirelessly devoted to (complimentary, written, solemn): 「練習に余念がない」 carries clear admiration — describing this person as diligently, earnestly, single-mindedly immersed in practice, solemn and written in tone, common in reports, criticism. It leans “diligence, effort, positive devotion,” a compliment of another's effort: 職人は技を磨くことに余念がない (the artisan is tirelessly devoted to honing his skill — admiring). 「〜に夢中だ」 = engrossed in, hooked on (neutral-leaning-colloquial, stressing absorption): 「練習に夢中だ」 leans “(out of liking／fascination) immersed, engrossed in practice,” its feel more neutral, colloquial, stressing “fascinated, absorbed, lost in it,” not necessarily the complimentary “diligent effort,” even sometimes negative (addicted): 子供はゲームに夢中だ (the child is engrossed in games — neutral or negative). Difference: 「に余念がない」 leans “diligent, effortful focus” (complimentary, written, admiring devotion); 「に夢中だ」 leans “fascination, absorption, engrossment” (neutral, colloquial, positive or negative). Test: to admiringly, in writing say “(someone) diligently, single-mindedly immersed in ～” → に余念がない; to colloquially say “(someone) engrossed, hooked, fascinated by ～” → に夢中だ. So describe an athlete earnestly practicing with 「余念がない」 (admiring diligence), and a child hooked on video games with 「夢中だ」 (neutral-leaning-engrossed).

🖊️ Practice Questions (5)

Q1. 「選手たちは、大会に向けて練習___。」(giving it their all)

(A) に余念がない　(B) に過ぎない　(C) を禁じ得ない　(D) に当たらない

Q2. 「に余念がない」の意味は?

(A) Wholly devoted / tirelessly diligent (fully focused)

(B) Absent-minded

(C) Slacking off

(D) Not caring at all

Q3. 「準備に余念がない」の意味は?

(A) Preparing with all one's might

(B) Not preparing

(C) Preparing carelessly

(D) Refusing to prepare

Q4. 「に余念がない」の語感は?

(A) Diligent, dedicated (positive)

(B) Lazy

(C) Command

(D) Condition

Q5. 接法が正しいのは?

(A) 研究に余念がない。　(B) 研究を余念がない。

(C) 研究してに余念がない。　(D) 研究だ余念がない。

Answer Explanations

1. (A) に余念がない ── Practicing with all their might.

2. (A) ── Wholly devoted / tirelessly diligent.

3. (A) ── Preparing with all one's might.

4. (A) ── Diligent, dedicated (positive).

5. (A) ── 「研究に余念がない」is correct.