Topic-Comment Structure: How Japanese Builds “は〜、〜ですね” (象は鼻が長い) [JLPT N4]

By Nihongo to Japan · Updated July 3, 2026

“象は鼻が長い,” “東京は物価が高い” — a complete analysis of は's topic-marking and the comment that follows

Topic-Comment Structure: How Japanese Builds “は〜、〜ですね”

A typical Japanese sentence is “topic + comment”: using 「は」 to mark the topic (as for…), then making a comment about that topic. E.g. 「東京は物価が高い」 (as for Tokyo, prices are high), 「象は鼻が長い」 (as for elephants, the nose is long). Here 「は」 corresponds to English “As for ～”, throwing out the topic first, with the whole rest of the sentence being about that topic. ⚠️ In the classic 「象は鼻が長い」, the topic is ‘elephant' but the subject is actually ‘nose' — the hallmark of Japanese topic sentences.

🧠 Core nuance: throw out the topic with は, then comment on it

The core is the two-layer structure of ‘は marks the topic → the following clause comments': 「は」 first marks the topic this sentence is about (Tokyo, elephant, Japanese), like “As for ～”; the whole predicate that follows is an explanation or comment on that topic (prices are high, nose is long, is hard). The key: the topic (は) isn't necessarily the subject — in 「象は鼻が長い」, ‘elephant' is the topic (as for elephants), and the real subject is ‘nose' (the nose is long). Japanese uses this “は…、…” structure to focus a topic first, then unfold — very natural.

📌 How to Connect

💬 Example Sentences

• 東京は物価が高い。(As for Tokyo, prices are high.) — topic + comment
• 象は鼻が長い。(As for elephants, the nose is long.) — topic ‘elephant' ≠ subject ‘nose'
• この映画はストーリーが面白い。(As for this movie, the story is interesting.) — topic-marking
• 日本語は難しいですね。(Japanese is difficult, isn't it.) — topic + comment
• 私はコーヒーがいい。(As for me, coffee is good.) — topic (me) + choice

🔄 Compare: は(topic) vs が(subject/emphasis) vs を(object)

⚠️ Common Mistakes

1. Topic ≠ subject: in 「象は鼻が長い」, ‘elephant' is the topic not the subject; the real subject is ‘nose.'
2. は vs が: topic-marking uses は (As for); emphasis, new info, specifying a subject uses が.
3. One topic per sentence: after は raises a topic, the rest is about it; don't repeat multiple は topics.
4. は ≈ As for: understanding は as ‘as for ～' captures the feel of topic sentences.

💡 Nuance & When to Use

A typical Japanese sentence is “topic + comment”: using 「は」 to mark the topic (as for…, like English As for ～), then commenting on that topic (prices high, nose long, is hard). The key: the topic (は) isn't necessarily the subject — in 「象は鼻が長い」, ‘elephant' is the topic and ‘nose' is the subject. Japanese uses this “は…、…” structure of focusing a topic first, then unfolding — very natural. Distinguish from the emphasizing/identifying が. Understanding topic sentences is fundamental to Japanese sentence structure. A must at N4.

🎯 JLPT Exam Tips

• N4 fundamentals: は marks the topic (As for ～) ＋ the following clause comments; the topic isn't necessarily the subject (象は鼻が長い).
• Distinction: は (topic, as for 〜) vs が (emphasis, new info, specifying the subject).
• Structure: the dual (topic)は(subject)が〜 structure.

🖊️ 練習題（5 題）

Q1. 「東京は物価が高い」的句子結構是？

(A) 主語（東京が）+ 述語

(B) 主題（東京は）+ 評述（物価が高い）

(C) 目的語 + 動詞

(D) 形容詞 + 名詞

Q2. 「象は鼻が長い」の「鼻」の役割は？

(A) 主題（Topic）

(B) 主語（Subject）

(C) 目的語

(D) 述語

Q3. 「日本語は難しい」と「日本語が難しい」の違いは？

(A) 完全に同じ

(B) は：日語這個話題，很難；が：強調難的是日語（不是別的語言）

(C) は：過去；が：現在

(D) は：書面語；が：口語

Q4. 「この映画___ストーリーが面白い。」（說到這部電影，故事很有趣，話題提示）

(A) が　(B) は　(C) を　(D) に

Q5. 主題提示の「は」は何語相当？

(A) 英語の主格 S

(B) 「As for ~（說到~的話）」

(C) 英語の目的格 O

(D) 英語の前置詞 in

答案解析

1. (B) ── 「東京は（主題：說到東京）物価が高い（評述：物價很高）」= 主題・評述句型。東京は 提示話題，後面說關於東京的評述。

2. (B) 主語（Subject） ── 「象は鼻が長い」中：象は = 主題（Topic）；鼻が = 主語（Subject，動作的執行者/狀態的主體）；長い = 述語。主題和主語是不同的語法概念。

3. (B) ── 「日本語は難しい（說到日語，很難）」= 中性話題提示；「日本語が難しい（難的是日語！）」= 強調識別，隱含「不是英語或其他語言，是日語特別難」。

4. (B) は ── 「この映画は（話題：這部電影）ストーリーが面白い（評述：故事很有趣）」= は 提示話題（这部電影是我們要說的主題）。

5. (B) ── は 相當於英語的「As for ~（說到~的話）」。例如「東京は物価が高い」= 「As for Tokyo, prices are high.」主題は 不是英語的主格S（主格用が），而是話題提示。