Our brains make countless judgments every day: having a thought (思う), thinking carefully (考える), making a decision (決める), choosing (選ぶ). These "invisible actions" have precise kanji counterparts in Japanese.
This article teaches you 20 kanji for thinking and judgment — from feelings to logic, from analysis to conclusions.
Core Kanji Table
Thinking & Learning
| Kanji | On'yomi | Kun'yomi | Meaning | Common Words | Note |
|---|---|---|---|---|---|
| 思 | シ (shi) | おも (omo) | think / feel | 思う (おもう, to think), 思い出 (おもいで, memory) | Intuitive thinking |
| 考 | コウ (kō) | かんが (kanga) | think / consider | 考える (かんがえる, to think), 参考 (さんこう, reference) | Logical thinking |
| 知 | チ (chi) | し (shi) | know | 知る (しる, to know), 知識 (ちしき, knowledge) | 知り合い = acquaintance |
| 学 | ガク (gaku) | まな (mana) | learn | 学ぶ (まなぶ, to learn), 学校 (がっこう, school) | 学ぶ = formal; 勉強する = everyday |
| 覚 | カク (kaku) | おぼ (obo)・さ (sa) | memorize / wake | 覚える (おぼえる, to memorize), 覚ます (さます, to wake up) | Two meanings: memory & awakening |
| 忘 | ボウ (bō) | わす (wasu) | forget | 忘れる (わすれる, to forget), 忘年会 (ぼうねんかい, year-end party) | 忘年会 = year-end party |
Decision & Selection
| Kanji | On'yomi | Kun'yomi | Meaning | Common Words | Note |
|---|---|---|---|---|---|
| 決 | ケツ (ketsu) | き (ki) | decide | 決める (きめる, to decide), 決心 (けっしん, determination) | 決まる = intransitive (to be decided) |
| 選 | セン (sen) | えら (era) | choose | 選ぶ (えらぶ, to choose), 選手 (せんしゅ, athlete) | 選手 = player / athlete |
| 調 | チョウ (chō) | しら (shira)・ととの (totono) | investigate / adjust | 調べる (しらべる, to look up), 調整 (ちょうせい, adjustment) | 調子 = condition / rhythm |
| 計 | ケイ (kei) | はか (haka) | calculate | 計る (はかる, to measure), 計画 (けいかく, plan) | 時計 = clock / watch |
| 比 | ヒ (hi) | くら (kura) | compare | 比べる (くらべる, to compare), 比較 (ひかく, comparison) | 比率 = ratio |
| 試 | シ (shi) | ため (tame)・こころ (kokoro) | try / test | 試す (ためす, to try), 試験 (しけん, exam) | 試験 = examination |
| 探 | タン (tan) | さが (saga)・さぐ (sagu) | search / explore | 探す (さがす, to search), 探検 (たんけん, exploration) | 探す = search for; 探る = probe |
Analysis & Judgment
| Kanji | On'yomi | Kun'yomi | Meaning | Common Words | Note |
|---|---|---|---|---|---|
| 測 | ソク (soku) | はか (haka) | measure | 測る (はかる, to measure), 測定 (そくてい, measurement) | 計る vs 測る: calculate vs measure |
| 判 | ハン (han)・バン (ban) | わか (waka) | judge | 判る (わかる, to understand), 判断 (はんだん, judgment) | 判る = kanji form of 分かる |
| 解 | カイ (kai)・ゲ (ge) | と (to)・わか (waka) | solve / understand | 解く (とく, to solve), 理解 (りかい, understanding) | 解ける = to be solvable (intransitive) |
| 察 | サツ (satsu) | — | observe / sense | 察する (さっする, to sense), 観察 (かんさつ, observation) | 警察 = police (same kanji!) |
| 認 | ニン (nin) | みと (mito) | recognize / approve | 認める (みとめる, to recognize), 確認 (かくにん, confirmation) | 認める = acknowledge / approve |
| 確 | カク (kaku) | たし (tashi) | certain / confirm | 確かめる (たしかめる, to verify), 確認 (かくにん, confirmation) | 確か = certain / sure |
| 評 | ヒョウ (hyō) | — | evaluate | 評価 (ひょうか, evaluation), 批評 (ひひょう, criticism) | Rarely used with kun'yomi |
思う vs 考える
Japanese has two key verbs for "think," and they work very differently:
| Comparison | 思う (おもう) | 考える (かんがえる) |
|---|---|---|
| Type | Intuition / feeling | Logic / analysis |
| Example | 美味しいと思う (I think it's tasty) | 原因を考える (think about the cause) |
| English | feel / think (opinion) | think (analyze) / consider |
| Pattern |
"あの映画は面白いと思う" = I think that movie is interesting (subjective feeling)
"なぜ面白いか考える" = Think about why it's interesting (logical analysis)
The Two Faces of 覚える
The kanji 覚 has two completely different kun'yomi readings and meanings:
| Reading | Verb | Meaning | Example |
|---|---|---|---|
| おぼ | 覚える (おぼえる) | memorize | 漢字を覚える (memorize kanji) |
| さ | 覚ます (さます) | wake (someone) up | 目を覚ます (wake up) |
| さ | 覚める (さめる) | wake up | 夢から覚める (wake from a dream) |
What do memory and waking up have in common? Both involve "consciousness becoming clear."
空気を読む — Japanese Decision-Making Culture
Japanese thinking and judgment are closely tied to 場の空気 (the atmosphere of a situation):
- 根回し (ねまわし): Behind-the-scenes consensus-building before formal meetings. Before using 決める (decide), Japanese people spend extensive time with 考える (think) and 調べる (investigate).
- 空気を読む (くうきをよむ): "Read the air." When Japanese people make judgments (判断する), they consider not just logic but the surrounding atmosphere.
- Confirmation culture: 確認 is one of the most frequently used words in Japanese workplaces — every decision requires repeated confirmation.
This is why Japanese has such a rich vocabulary for thinking and judgment — the culture values the process over the result.
Practice
Q1. What's the difference between 思う and 考える?
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Intuition vs. logic. 思う = intuitive thoughts or feelings (I think/feel that~); 考える = logical, analytical thinking (think about the cause).
Q2. 覚える and 覚ます use the same kanji. Why do they mean different things?
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Different kun'yomi readings. 覚える (おぼえる) = memorize; 覚ます (さます) = wake up. The connection: both mean "consciousness becoming clear" — memorizing is clarity of knowledge, waking is clarity of the body.
Q3. 計る and 測る are both read はかる. What's the difference?
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Calculate vs. measure. 計る leans toward calculating time or quantities (時間を計る = time something), while 測る leans toward measuring physical quantities (温度を測る = measure temperature).
Q4. What is 根回し? Which thinking kanji does it involve?
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Behind-the-scenes consensus-building. 根回し = privately coordinating with stakeholders before a formal decision. It involves: 考える (think), 調べる (investigate), 決める (decide) — think first, research, then decide.
Q5. Why is 確認 so important in Japanese workplaces?
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Confirmation culture. Japanese workplaces emphasize process and accuracy, requiring repeated confirmation (確かめる) before decisions. "確認お願いします" (please confirm) is one of the most-heard phrases at work. 確 = certain, 認 = recognize.
Summary
- 思う = intuitive thinking, 考える = logical thinking — this is the most crucial distinction
- 覚 has two meanings: 覚える = memorize, 覚ます = wake up
- 計る vs 測る: calculate vs measure — same pronunciation, different kanji
- Japanese culture values process: 根回し, 空気を読む, confirmation culture all relate to "judgment"
- Analysis/judgment kanji (判, 解, 察, 認, 確, 評) mostly use on'yomi to form formal vocabulary
- Next up: Creation & Change — learn kanji like 作る, 壊す, 変わる