Meaning
極 means extreme, the furthest point, or the utmost limit. It captures the idea of reaching the very end or top of something — geographically, like the North or South Pole, or figuratively, like the pinnacle of a skill or the height of an emotion.
Structurally, 極 combines the radical 木 (tree/wood) on the left with 亟 on the right — a component that historically conveyed urgency and going to the farthest extent. Together, they evoke a tree's topmost branch: the highest, most extreme point of growth.
With 12 strokes, this kanji is taught in Grade 4 of Japanese elementary school. Though listed at N2 for active productive use, you will encounter it constantly — in newspapers, formal speech, and everyday compounds. It spans geography (the North and South Poles), daily expression (「極めて難しい」— extremely difficult), and spiritual vocabulary (「極楽」— paradise).
Mastering 極 pays off quickly. It anchors a wide cluster of vocabulary about limits, achievement, and absolutes across geography, daily speech, and classical culture alike.
Readings
On'yomi (音読み) — Chinese-derived readings
極 has two on'yomi readings, both from classical Chinese. Each clusters around a distinct set of vocabulary.
キョク (kyoku) — The more common reading. It appears in formal and technical compounds dealing with geographic poles, abstract limits, and expressions of maximum effort.
- 極端 (kyokutan) — extreme, going to extremes
- 極限 (kyokugen) — the utmost limit, extremity
- 究極 (kyuukyoku) — ultimate, final, the very end
- 北極 (hokkyoku) — the North Pole
- 南極 (nankyoku) — the South Pole
ゴク (goku) — This reading leans toward superlatives: the very best, the very worst, absolutely top-tier. It carries a more emphatic, colloquial feel than キョク.
- 極上 (gokujou) — finest quality, top grade
- 極秘 (gokuhi) — top secret, strictly confidential
- 極楽 (gokuraku) — paradise, bliss (Buddhist Pure Land)
Kun'yomi (訓読み) — Native Japanese readings
The kun'yomi readings appear in native Japanese constructions — verb conjugations and standalone nouns.
きわ (kiwa) — As a noun, refers to an edge, brink, or extreme point. Rarely seen on its own; it usually appears in set expressions. The related form きわみ (written 極み) means the height or apex of something.
- 贅沢の極み (zeitaku no kiwami) — the height of luxury
- 幸せの極み (shiawase no kiwami) — the peak of happiness
きわ.める (kiwameru) — Transitive verb: to master, to carry something to its extreme, or to investigate thoroughly. A key usage for N2 learners.
- 技術を極める (gijutsu wo kiwameru) — to master a skill
- 道を極める (michi wo kiwameru) — to pursue a path to its ultimate end
きわ.まる (kiwamaru) — Intransitive verb: to reach the extreme or to be at the utmost point. Common in set phrases where something has hit its limit. The negative form きわまりない is especially frequent in formal and written Japanese.
- 失礼きわまる (shitsurei kiwamaru) — to be the height of rudeness
- 危険きわまりない (kiken kiwamari nai) — to be extremely dangerous
Common Words & Compounds
極 appears across a wide range of contexts. Here are key compounds grouped by theme.
Geographic / Scientific:
- 北極 (hokkyoku) — the North Pole
- 南極 (nankyoku) — the South Pole
- 極地 (kyokuchi) — polar region
- 磁極 (jikyoku) — magnetic pole
Expressing Degree / Limits:
- 極端 (kyokutan) — extreme, going to extremes
- 極限 (kyokugen) — the ultimate limit
- 究極 (kyuukyoku) — ultimate, the final answer
- 極力 (kyokuryoku) — to the best of one's ability, as much as possible
- 極めて (kiwamete) — extremely, exceedingly (adverb)
Quality / Status:
- 極上 (gokujou) — finest, top quality
- 極秘 (gokuhi) — top secret
- 極悪 (gokuaku) — heinous, extremely evil
Spiritual / Cultural:
- 極楽 (gokuraku) — paradise (Buddhist term), also used casually to mean bliss
- 極意 (gokui) — secret teachings, the essence of an art or skill
Example Sentences
この問題は極めて難しいです。
Kono mondai wa kiwamete muzukashii desu.
This problem is extremely difficult.
彼は武道を極めた達人だ。
Kare wa budou wo kiwameta tatsujin da.
He is a master who has reached the pinnacle of martial arts.
北極の気温は極めて低い。
Hokkyoku no kion wa kiwamete hikui.
The temperature at the North Pole is extremely low.
彼女の行動は失礼きわまりない。
Kanojo no koudou wa shitsurei kiwamari nai.
Her behavior is the height of rudeness.
究極の選択を迫られた。
Kyuukyoku no sentaku wo semarareta.
I was forced into an impossible choice.
極秘の情報が漏れたらしい。
Gokuhi no jouhou ga moreta rashii.
It seems the top-secret information was leaked.
極力、ミスをしないように気をつけた。
Kyokuryoku, misu wo shinai you ni ki wo tsuketa.
I did my best not to make mistakes.
このレストランの料理は極上だと評判だ。
Kono resutoran no ryouri wa gokujou da to hyouban da.
This restaurant is reputed to serve the finest cuisine.
温泉に入るのは極楽だね。
Onsen ni hairu no wa gokuraku da ne.
Soaking in a hot spring is absolute bliss, isn't it?
極端な考え方は避けたほうがいい。
Kyokutan na kangaekata wa saketa hou ga ii.
It's better to avoid extreme ways of thinking.
Memory Tip
Picture a great tree (木) climbed all the way to its topmost branch — you can go no higher. That tip is the essence of 極. Whether it's the North Pole (北極), top secret (極秘), paradise (極楽), or mastering a craft (極める), every use of this kanji points to that final, furthest, most extreme point. See the treetop in 極 once, and it sticks.