In short

Japanese adjectives have no comparative form: 大きい ōkii means both “big” and “bigger”. Comparison is done with particles instead - より yori marks the loser (“than B”), のほうが no hō ga foregrounds the winner, and the adverb いちばん ichiban (“number one”) makes a superlative. So 東京は大阪より大きいです Tōkyō wa Ōsaka yori ōkii desu is “Tokyo is bigger than Osaka”, and 日本でいちばん大きいです Nihon de ichiban ōkii desu is “it’s the biggest in Japan”.

The rule

Step 1 - The baseline: A は B より + adjective. より attaches straight to the noun - no の, no と, nothing between them. The adjective is an ordinary predicate, so tense and politeness live there, exactly as in lesson 8.

この本はあの本より新しいです。 (Kono hon wa ano hon yori atarashii desu.) - This book is newer than that one.

The Bより phrase is an adverbial, so it can slide: 大阪より東京は大きいです is possible, but A は B より is the neutral order and the one to drill.

Step 2 - のほうが foregrounds the winner. ほう (written 方 in kanji, but very often left in kana) literally means “side”. AのほうがBより〜です presents A as the side that wins. Use it when A is new information rather than an established topic - typically in an answer.

電車のほうがバスより速いです。 (Densha no hō ga basu yori hayai desu.) - The train is faster than the bus.

Either half may be dropped once context is clear: 電車のほうが速いです (“the train is faster”) or バスより速いです (“faster than the bus”). Note the particle が on ほう - it is the subject, so a noun links to it with の, never with が or を.

Step 3 - Asking with two options. For a choice between exactly two things, Japanese uses どちら dochira (“which of the two”), never どれ:

• AとB（と）、どちらのほうが〜ですか。
• AとBとでは、どちらのほうが〜ですか。 - the では version sets the pair up as the field of comparison.

The ほうが may be left out (どちらが〜ですか), and casual speech shortens どちら to どっち. There is no yes/no answer available: you must name the winner with 〜のほうが〜です.

Step 4 - Superlative with いちばん. いちばん (一番, “number one”) is an adverb. Put it directly in front of the adjective or verb - never bare in front of the noun. (一番 is also a noun, so it can precede a noun via の - いちばんの親友 “one’s best friend” - but that is a separate pattern, not the superlative frame taught here.)

The set you are comparing inside is marked in one of three ways:

• 〜の中で no naka de - the default when the set is a group noun or a list: クラスの中で、この三つの中で
• plain で - when the set is a place or an already-bounded domain: 日本で、世界で、うちで
• a category noun + で／の中で - スポーツの中で、日本料理で

日本でいちばん高い山は富士山です。 (Nihon de ichiban takai yama wa Fujisan desu.) - The highest mountain in Japan is Mt Fuji.

Step 5 - Superlative questions take が. Ask with 何・誰・どこ・いつ + が + いちばん〜ですか. The subject is が, not は, because an interrogative can never be a topic - the thing you are asking about is by definition not yet known (see lesson 4). The answer keeps が: 富士山がいちばん高いです。

Step 6 - Equality: 〜と同じくらい and 〜と同じだ. 〜と同じくらい + adjective means “about as … as”. 〜と同じです on its own means “the same as”. 同じ is unusual: although it behaves like a な-adjective, it modifies a noun with no な - 同じ本 onaji hon, never ×同じな本.

Step 7 - Negative comparison: 〜ほど〜ない. A は B ほど + negative means “A is not as … as B”. The predicate must be negative - this pattern cannot end in an affirmative.

今年の夏は去年ほど暑くないです。 (Kotoshi no natsu wa kyonen hodo atsukunai desu.) - This summer is not as hot as last year.

It is also the polite way to decline a compliment, because it lowers yourself without criticising anyone: 田中さんほど上手じゃないです (“I’m not as good as Tanaka”).

Step 8 - Degree modifiers. A comparison can be strengthened, but not with とても or たいへん - those describe an absolute degree, not a gap. Use もっと motto (“more”), ずっと zutto (“far, by a long way”), もう少し mō sukoshi (“a bit more”), or 少し／ちょっと (“slightly”). They sit immediately before the adjective: 昨日よりずっと寒いです。

Step 9 - Comparing actions. Put a plain-form verb in front of ほう and it modifies it as a noun-modifying clause (lesson 18): V-plain + ほうがいいです. The ます-form is impossible here (×行きますほうが).

歩くほうが体にいいです。 (Aruku hō ga karada ni ii desu.) - Walking is better for your health.

Swap the dictionary form for the た-form and the meaning shifts from neutral comparison to personal advice: 歩いたほうがいいです (“you’d better walk”). That advice pattern belongs to Obligation, necessity and advice.

Forms & patterns

The six comparison frames.

Marking the set for a superlative.

Which question word.

All of them take が in a superlative question: 誰がいちばん速いですか dare ga ichiban hayai desu ka.

Degree modifiers in comparisons.

Examples

Common mistakes

• 東京は大阪よりとても大きいです。 (Tōkyō wa Ōsaka yori totemo ōkii desu.) -> 東京は大阪よりずっと大きいです。 (Tōkyō wa Ōsaka yori zutto ōkii desu.) - とても states an absolute degree and cannot measure a gap. A comparison takes もっと or ずっと.
• コーヒーと紅茶と、どれのほうが好きですか。 (Kōhī to kōcha to, dore no hō ga suki desu ka.) -> コーヒーと紅茶と、どちらのほうが好きですか。 (Kōhī to kōcha to, dochira no hō ga suki desu ka.) - With exactly two candidates Japanese always uses どちら. どれ needs three or more.
• 果物の中で何はいちばん好きですか。 (Kudamono no naka de nani wa ichiban suki desu ka.) -> 果物の中で何がいちばん好きですか。 (Kudamono no naka de nani ga ichiban suki desu ka.) - An interrogative is unknown information, so it can never be the topic は. Question words take が.
• 大阪は東京ほど寒いです。 (Ōsaka wa Tōkyō hodo samui desu.) -> 大阪は東京ほど寒くないです。 (Ōsaka wa Tōkyō hodo samukunai desu.) - 〜ほど in this pattern demands a negative predicate. With an affirmative adjective the sentence is simply ungrammatical.
• 歩きますほうが体にいいです。 (Arukimasu hō ga karada ni ii desu.) -> 歩くほうが体にいいです。 (Aruku hō ga karada ni ii desu.) - ほう is a noun, so the verb in front of it modifies it and must be plain. Politeness is carried by です at the end of the sentence.

Tips

• There is no comparative ending to learn. 高い is “expensive” and “more expensive” at the same time; only the particles change. This is a relief, but it also means a bare 高いです in an answer is ambiguous - add のほうが when you want “the … one is” to be unmistakable.
• より marks the loser, ほう marks the winner. If you can remember which side each attaches to, you can build any comparison and, just as usefully, decode one: whatever noun carries より is the thing being beaten.
• いちばん goes next to the adjective, not the noun. 日本でいちばん高い山 is “the highest mountain in Japan”; いちばん sits in front of 高い, inside the phrase that modifies 山. Learners who move it in front of the noun break the superlative frame.
• 〜ほど〜ない is the polite gear. Saying 私は田中さんほど上手じゃないです ranks yourself below someone without ever calling them worse than anyone. It is the standard, socially safe way to make a downward comparison.