直る/直す vs. 治る/治す (Naoru / Naosu): When to Use 直 (Repair/Correct) vs. 治 (Heal/Cure) & 正 (Correct)
In spoken Japanese, fixing a broken bicycle (直す), correcting a typo (直す), and curing a cold (治す) are all pronounced なおす (naosu)! Here is how the kanjis separate mechanical/general fixes from medical healing.
Look at how Japanese separates 直 (Straighten / Repair — naosu / naoru) from 治 (氵 Water + 台 = Heal / Cure): whenever you are talking about curing a sickness (病気 byōki), injury, cold, or toothache, use 治 (soothing healing water!). For everything else — broken machines, bad habits, crooked posture, or test mistakes — use 直 (Straighten)!
Quick Comparison: 直 (Straight) vs. 正 (Correct) vs. 病 (Illness) vs. 医 (Medicine)
Compare 直 (Repair/Straighten), 正 (Correct/Proper), 病 (Sick), and 医 (Doctor) below:
| Kanji & Meaning | Primary Readings (Bold = Primary) | Shibashi Visual Mnemonic Hook | Common Compound Word |
|---|---|---|---|
| 直 — Straight | On: ちょく, じき Kun: なお |
十 (Crosshair) + 目 (Eye) + L-corner = straightening something crooked = FIX / REPAIR / CORRECT / STRAIGHT (naosu / naoru / choku). | 直す (なおす) — to fix, to repair |
| 正 — Correct | On: せい, しょう Kun: ただ, まさ |
一 (Finish line) over 止 (Footprint) = stopping right on the mark = CORRECT / RIGHT / PROPER (tadashii / sei / shō). | 正しい (ただしい) — correct |
| 病 — Illness | On: びょう, へい Kun: や |
疒 (Sickbed) + 丙 = SICK / ILLNESS (byō, as in 病気 byōki). | 病院 (びょういん) — hospital, clinic, doctor'... |
| 医 — Medicine | On: い Kun: — |
匚 + 矢 = MEDICINE / DOCTOR (i, as in 医者 isha). | 医者 (いしゃ) — medical doctor |
Side-by-Side Illustrated Kanji Flashcards (Tap Readings for Audio)
Compare the custom Shibashi artwork for 直 (Straight) and 正 (Correct) below. Notice how each illustration embeds both the English meaning and the primary Japanese reading directly into the scene, and tap any reading to hear native pronunciation:
Step-by-Step Visual Breakdown & Radical Rules
Remember both the kanji choice (直 vs. 治) AND the transitive/intransitive ending (-su vs. -ru):
1. 直 (Straight) — Mnemonic Story & Readings
On'yomi: ちょく, じき | Kun'yomi: なお
Shibashi Visual Story: “With a tragic kick (じき) the cabinet is now (なお) super broken, and tv straight on the floor. Let's eat an artichok(u) (ちょく) and keep watching...” Key visual distinction: 十 (Crosshair) + 目 (Eye) + L-corner = straightening something crooked = FIX / REPAIR / CORRECT / STRAIGHT (naosu / naoru / choku).
- 直す (なおす): to fix, to repair
- 直 (じき): earnestly, immediately, exactly
- もう直ぐ (もうすぐ): soon, shortly, before long, nearly, almost
2. 正 (Correct) — Mnemonic Story & Readings
On'yomi: せい, しょう | Kun'yomi: ただ, まさ
Shibashi Visual Story: “When a talented dark (ただ) shogun (しょう) with a light saber (せい) and a book of his ma’s savvy (まさ) advice tells you to go right, you know this must be correct...” Key visual distinction: 一 (Finish line) over 止 (Footprint) = stopping right on the mark = CORRECT / RIGHT / PROPER (tadashii / sei / shō).
- 正しい (ただしい): correct
- 正 (せい): (logical) true, regular
- 正午 (しょうご): noon, mid-day
3. 病 (Illness) — Mnemonic Story & Readings
On'yomi: びょう, へい | Kun'yomi: や
Shibashi Visual Story: “Fabio (びょう) thought he just had a yucky (や) hay (へい) fever but was actually very ill...” Key visual distinction: 疒 (Sickbed) + 丙 = SICK / ILLNESS (byō, as in 病気 byōki).
- 病院 (びょういん): hospital, clinic, doctor's office, doctor's surgery, infirmary
4. 医 (Medicine) — Mnemonic Story & Readings
On'yomi: い | Kun'yomi: —
Shibashi Visual Story: “An arrow wound from ear to ear (い) will need some world-class medicine, but somehow the warrior doesn’t seem too worried.” Key visual distinction: 匚 + 矢 = MEDICINE / DOCTOR (i, as in 医者 isha).
Essential Japanese Vocabulary Words Using 直 / 正 / 病 / 医
Once you can recognize 直 (Straight) and 正 (Correct) and 病 (Illness) individually, lock them into your active reading vocabulary with these high-frequency Japanese words from the Shibashi app:
| Japanese Word | Hiragana Reading | English Meaning | Level |
|---|---|---|---|
| 直す | なおす | to fix, to repair | JLPT |
| 直 | じき | earnestly, immediately, exactly | JLPT |
| もう直ぐ | もうすぐ | soon, shortly, before long, nearly, almost | JLPT |
| 正しい | ただしい | correct | JLPT |
| 正 | せい | (logical) true, regular | JLPT |
| 正午 | しょうご | noon, mid-day | JLPT |
| 病院 | びょういん | hospital, clinic, doctor's office, doctor's surgery, infirmary | JLPT |
| 医者 | いしゃ | medical doctor | JLPT |
5-Second Memory Summary: How to Never Mix Up 直 & 正 & 病 Again
Body/Illness/Injury heals? Use 治 (氵 Water + 台): 病気が治る (byōki ga naoru — illness is cured). Machine, object, mistake, or mood is fixed? Use 直 (Straighten): 時計を直す (tokei o naosu — fix a watch). And -SU (直す/治す) is transitive ('I fix/cure X'), while -RU (直る/治る) is intransitive ('X gets fixed/healed')!
