Every word comes with furigana, romaji, and an original example sentence from real life in Japan.
10055 words · JLPT N1
JLPT N1 vocabulary
Words 421–430
houwa
saturation
市場はすでに飽和しています。
しじょう は すでに ほうわ しています。
shijou wa sudeni houwa shiteimasu.
The market is already saturated.
Say 飽和 out loud inside a short sentence about your day. Linking it to “saturation” in your own words builds the memory faster than rereading it.
Read the full tip →bouchou
expansion / swelling
熱で金属が膨張します。
ねつ で きんぞく が ぼうちょう します。
netsu de kinzoku ga bouchou shimasu.
Metal expands with heat.
Picture the last situation where you needed the idea of “expansion” — at work, at the station, online — and attach 膨張 to that exact scene.
Read the full tip →shuushuku
contraction
寒さで筋肉が収縮します。
さむさ で きんにく が しゅうしゅく します。
samusa de kinniku ga shuushuku shimasu.
Muscles contract in the cold.
Make 収縮 yours: write one short sentence about “contraction” from your own life, and this word will come back when you actually need it.
Read the full tip →shinshuku
elasticity / scaling
この素材はよく伸縮します。
この そざい は よく しんしゅく します。
kono sozai wa yoku shinshuku shimasu.
This material stretches well.
Make 伸縮 yours: write one short sentence about “elasticity” from your own life, and this word will come back when you actually need it.
Read the full tip →kakuchou
extension / expansion
メモリを拡張しました。
めもり を かくちょう しました。
memori o kakuchou shimashita.
I expanded the memory.
Say 拡張 out loud inside a short sentence about your day. Linking it to “extension” in your own words builds the memory faster than rereading it.
Read the full tip →kakujuu
expansion / enhancement
福利厚生を拡充しました。
ふくり こうせい を かくじゅう しました。
fukuri kousei o kakujuu shimashita.
We enhanced the employee benefits.
Say 拡充 out loud inside a short sentence about your day. Linking it to “expansion” in your own words builds the memory faster than rereading it.
Read the full tip →zoukyou
reinforcement
サーバーの性能を増強しました。
さーばー の せいのう を ぞうきょう しました。
saabaa no seinou o zoukyou shimashita.
We boosted the server's performance.
Make 増強 yours: write one short sentence about “reinforcement” from your own life, and this word will come back when you actually need it.
Read the full tip →zoushoku
proliferation
細菌は温かい場所で増殖します。
さいきん は あたたかい ばしょ で ぞうしょく します。
saikin wa atatakai basho de zoushoku shimasu.
Bacteria multiply in warm places.
Tie 増殖 to one concrete moment from your own week in Japan where “proliferation” came up — a word anchored to a real scene sticks far better than a definition.
Read the full tip →hanshoku
breeding
この鳥は春に繁殖します。
この とり は はる に はんしょく します。
kono tori wa haru ni hanshoku shimasu.
This bird breeds in spring.
Say 繁殖 out loud inside a short sentence about your day. Linking it to “breeding” in your own words builds the memory faster than rereading it.
Read the full tip →han'ei
prosperity
町は貿易で繁栄しました。
まち は ぼうえき で はんえい しました。
machi wa boueki de han'ei shimashita.
The town prospered through trade.
Picture the last situation where you needed the idea of “prosperity” — at work, at the station, online — and attach 繁栄 to that exact scene.
Read the full tip →Full-level practice
Ten sets, fifty randomly selected questions in every set.
Randomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final setRandomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final setRandomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final setRandomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final setRandomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final setRandomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final setRandomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final setRandomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final setRandomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final setRandomly selected from the full N1 vocabulary level, with four answer choices for every question.
Start final set