What are Comparative Adjectives?
Unlike English where adjectives change form (big → bigger → biggest), Japanese adjectives don't change for comparisons. Instead, Japanese uses particles and adverbs like より (than), のほうが (more than), and 一番 (most) to express comparative and superlative meanings.
English: bigger, biggest
Japanese: 大きい (same form always)
Use particles to show comparison
Key Principle
Adjectives stay the same
大きい → 大きい → 大きい
"Big" (base/comparative/superlative)
Add particles, not suffixes
No form changes
Basic Comparison Structure
A は B より [adjective]
東京は大阪より大きい
"Tokyo is bigger than Osaka"
犬は猫より大きい
"Dogs are bigger than cats"
Standard comparative
A より B のほうが [adjective]
大阪より東京のほうが大きい
"Tokyo is bigger than Osaka"
Emphasis on preferred item
い-Adjectives in Comparisons
Present affirmative
高い → より高い
"Expensive → more expensive"
難しい → より難しい
"Difficult → more difficult"
Form unchanged
Negative comparisons
高くない → より高くない
"Not expensive → less expensive"
難しくない → より難しくない
"Not difficult → less difficult"
Negative stem + ない
Past comparisons
高かった → より高かった
"Was expensive → was more expensive"
Past form + comparison
な-Adjectives in Comparisons
Present affirmative
便利 → より便利
"Convenient → more convenient"
きれい → よりきれい
"Pretty → prettier"
No change to adjective
With だ/です
便利だ → より便利だ
"Is convenient → is more convenient"
Copula added as needed
Superlative with 一番
一番 + adjective
一番高い
"Most expensive / The most expensive"
一番難しい
"Most difficult / The most difficult"
一番 precedes adjective
[Group] で一番
クラスで一番背が高い
"The tallest in the class"
日本で一番大きい
"The biggest in Japan"
Specifies comparison group
Comparative Patterns Summary
Three main structures
Comparative (2 items):
A は B より 大きい
"A is bigger than B"
Emphatic comparative:
B より A のほうが 大きい
"A is bigger than B"
Superlative (3+ items):
A は 一番 大きい
"A is the biggest"
Different structures, same adjective
もっと (Even more)
Adding emphasis
もっと大きい
"Even bigger / Bigger (than that)"
もっと速く
"Even faster"
Emphasizes comparison
もっと vs より
より: marks standard
AよりB "B than A"
もっと: intensifier
もっと大きい "even bigger"
Different functions
ずっと (Much more)
Significant difference
ずっと大きい
"Much bigger"
ずっと難しい
"Much more difficult"
Large gap emphasized
Combining patterns
AよりBのほうがずっと大きい
"B is much bigger than A"
Multiple markers together
さらに (Even more/Furthermore)
Formal emphasis
さらに速い
"Even faster"
さらに高度な
"Even more advanced"
Formal/written style
Common Comparative Adjectives
Size comparisons
大きい → より大きい
"Bigger"
小さい → より小さい
"Smaller"
長い → より長い
"Longer"
短い → より短い
"Shorter"
Quality comparisons
いい/よい → よりいい
"Better"
悪い → より悪い
"Worse"
新しい → より新しい
"Newer"
古い → より古い
"Older"
Difficulty comparisons
難しい → より難しい
"More difficult"
簡単 → より簡単
"Easier"
複雑 → より複雑
"More complex"
Speed and intensity
速い → より速い
"Faster"
遅い → より遅い
"Slower"
強い → より強い
"Stronger"
弱い → より弱い
"Weaker"
Negative Comparisons
"Less" expressions
高くない → より高くない
"Less expensive"
難しくない → より難しくない
"Less difficult"
Use negative form
"Not as...as"
AほどBじゃない
"Not as B as A"
東京ほど大きくない
"Not as big as Tokyo"
ほど with negative
Special Cases
いい/よい (good/better)
Base: いい/よい
Comparative: よりいい/よりよい
Superlative: 一番いい
Same form, add markers
大きい vs 大きな
大きい: regular い-adjective
より大きい "bigger"
大きな: pre-noun only
No comparative form
Different types
Multiple Comparisons
Ranking three or more
A、B、Cの中で、Aが一番大きい
"Among A, B, and C, A is the biggest"
Use 一番 for 3+ items
Equal Comparisons
同じくらい (about the same)
AはBと同じくらい大きい
"A is about as big as B"
Equal degree
A も B も同じ
どちらも同じくらい高い
"Both are about equally expensive"
No significant difference
Incremental Comparisons
だんだん/徐々に (gradually)
だんだん難しくなる
"Gradually becomes more difficult"
徐々に速くなる
"Gradually becomes faster"
Progressive change
ますます (more and more)
ますます難しい
"More and more difficult"
ますます人気
"More and more popular"
Increasing degree
Common Mistakes
Adding English-style suffixes
Wrong: 大きいer ⚠️
Wrong: 大きiest ⚠️
Correct: より大きい ✓
Correct: 一番大きい ✓
Japanese doesn't inflect adjectives
Wrong particle choice
Wrong: 東京が大阪より大きい ⚠️
Better: 東京は大阪より大きい ✓
Use は for subject in comparisons
Forgetting の in のほうが
Wrong: Aよりほうが ⚠️
Correct: Aよりのほうが ✓
の is required
Using 一番 for two items
Unnatural: AとBで一番好き ⚠️
Natural: AよりBのほうが好き ✓
Use comparative for two items
Polite Forms
です/ます endings
Casual: より大きい
"Bigger"
Polite: より大きいです
"Is bigger"
Add polite copula
Formal Comparisons
より for written style
この方法はより効果的です
"This method is more effective"
Business/academic contexts
一層/更に (even more - formal)
一層困難な
"Even more difficult"
更なる発展
"Further development"
Formal writing
Practical Comparison Patterns
Shopping comparisons
これとそれ、どちらが安いですか
"Which is cheaper, this or that?"
こちらのほうが安いです
"This one is cheaper"
Consumer contexts
Preference statements
夏より冬のほうが好き
"I like winter more than summer"
肉より魚のほうがいい
"Fish is better than meat"
Personal choices
Temporal Comparisons
前より/昨日より
前より上手になった
"Became better than before"
昨日より寒い
"Colder than yesterday"
Time-based standards
Practice Sentences
Basic
東京は大阪より大きい
"Tokyo is bigger than Osaka"
これのほうが安い
"This one is cheaper"
日本で一番高い山
"The highest mountain in Japan"
Intermediate
日本語は英語より文法が複雑だと思います
"I think Japanese grammar is more complex than English"
この問題は思ったより難しくなかった
"This problem wasn't more difficult than I thought"
世界で一番美しい景色を見た
"I saw the most beautiful scenery in the world"
Advanced
技術が進歩すればするほど、私たちの生活は
より便利になるが、同時により複雑にもなる。
50年前と比べて、現代の生活は
はるかに快適になった。しかし、
一番大切なのは、便利さではなく、
心の豊かさだと思う。昔の人々のほうが、
精神的にはより充実していたかもしれない。
"The more technology progresses, the more convenient our lives
become, but at the same time they also become more complex.
Compared to 50 years ago, modern life has
become far more comfortable. However,
I think what's most important is not convenience,
but richness of heart. People of the past
may have been more spiritually fulfilled."
語学学習において、最初は簡単に感じても、
進めば進むほどより難しくなる。しかし、
諦めずに続けることが一番重要だ。
努力すればするほど、より深く理解できる
ようになる。完璧を目指すよりも、
少しずつでも前より上達することを
目標にしたほうがいい。
"In language learning, even if it feels easy at first,
the more you progress, the more difficult it becomes. However,
continuing without giving up is most important.
The more effort you make, the more deeply you
can understand. Rather than aiming for perfection,
it's better to aim for improving little by little
compared to before."
Related Grammar Points
- より - Than (comparison marker)
- のほうが - More than (emphatic)
- 一番 - Most (superlative)
- ほど - As...as (extent)
- くらい/ぐらい - About (degree)
- 同じ - Same (equality)
- もっと - Even more (intensifier)
- ずっと - Much more (large difference)