Academic Writing Style in Japanese

Overview

Japanese academic writing follows conventions that differ substantially from both everyday written Japanese and English academic prose. At the C2 level, mastering these conventions is essential for reading scholarly articles, writing research papers, and participating in academic discourse in Japanese. The style is characterized by the である体 (de aru-tai) copula form, heavy use of passive and nominalized constructions, and specific hedging expressions that reflect the value Japanese academia places on modesty and precision.

Unlike conversational Japanese, which relies on です/ます politeness or plain-form casualness, academic Japanese employs a distinct written register that signals objectivity and scholarly rigor. This register avoids first-person assertions in favor of impersonal constructions, uses nominalization to foreground processes over agents, and follows predictable structural patterns for thesis statements, evidence presentation, and conclusions.

Building on the formal written style (である体 and related patterns), academic writing adds discipline-specific conventions for citations, hedging, logical connectors, and structural organization that align with Japanese scholarly publishing norms. Competence here opens access to Japanese university coursework, research collaboration, and professional academic publication.

How It Works

The である体 (De Aru Style)

Academic texts use である as the copula instead of だ (plain) or です (polite).

Function	Polite Style	Academic Style
Copula	〜です	〜である
Copula (past)	〜でした	〜であった
Negative copula	〜ではありません	〜ではない
Verb ending	〜ます	Dictionary form (〜る)
Conjunction	〜ですが	〜であるが

Passive and Impersonal Constructions

Academic Japanese strongly favors passive voice to maintain objectivity.

Pattern	Meaning	Usage
〜と考えられる	It is thought that...	Hedged assertion
〜と言われている	It is said that...	Citing common knowledge
〜が指摘されている	It has been pointed out that...	Referencing prior research
〜が示されている	It has been shown that...	Evidence-based claim
〜が求められる	It is required/desired	Identifying needs
〜が見られる	It can be observed that...	Reporting observations

Nominalization Patterns

Turning verbs into noun phrases is a hallmark of academic Japanese.

Verbal Form	Nominalized Form	Meaning
検討する	検討	examination
分析する	分析	analysis
変化する	変化	change
増加する	増加	increase
〜することが必要である	the necessity of doing...	nominalized requirement

Hedging Expressions

Japanese academic writing requires careful hedging to avoid overstatement.

Expression	Meaning	Strength
〜と考えられる	is thought to be	moderate
〜可能性がある	there is a possibility	weak
〜と推測される	is inferred/estimated	moderate
〜と言える	it can be said	moderate-strong
〜傾向がある	there is a tendency	weak-moderate
〜と思われる	it seems that	moderate

Citation Patterns

Pattern	Example	Meaning
Author (year) によれば	田中(2020)によれば	According to Tanaka (2020)
Author (year) は〜と述べている	佐藤(2019)は〜と述べている	Sato (2019) states that...
Author (year) では〜が報告されている	山田(2021)では〜が報告されている	In Yamada (2021), ... is reported

Examples in Context

Japanese	English	Note
以上の結果から、次のことが言える。	From the above results, the following can be said.	Conclusion transition
この現象は〜に起因すると考えられる。	This phenomenon is thought to be caused by...	Hedged causal claim
田中(2020)によれば、〜とされている。	According to Tanaka (2020), it is held that...	Citation pattern
本稿では、〜について検討する。	In this paper, we examine...	Thesis statement
先行研究において、〜が明らかにされている。	In prior research, ... has been clarified.	Literature reference
今後の課題として、〜が挙げられる。	As a future task, ... can be identified.	Future work statement
この結果は〜を示唆するものである。	This result suggests...	Hedged interpretation
以下、〜について論じる。	Below, we discuss...	Section transition
〜という点で、本研究は意義を持つ。	In that respect, this research has significance.	Significance claim
統計的に有意な差が認められた。	A statistically significant difference was observed.	Results reporting
なお、この点については別稿に譲りたい。	This point will be addressed in a separate paper.	Scope limitation
上述の通り、〜であることが確認された。	As stated above, it was confirmed that...	Back-reference

Common Mistakes

Using です/ます in academic papers

• Wrong: この結果は重要です。
• Right: この結果は重要である。
• Why: Academic writing requires the である体 throughout. Mixing in です/ます breaks register consistency and reads as unprofessional.

Making direct claims without hedging

• Wrong: この結果は〜を証明する。 (This result proves...)
• Right: この結果は〜を示唆するものと考えられる。 (This result is thought to suggest...)
• Why: Japanese academic culture values epistemic modesty. Direct, unhedged claims are considered overconfident and poor scholarly practice.

Using first-person pronouns freely

• Wrong: 私はこの問題を調べた。 (I investigated this problem.)
• Right: 本研究では、この問題について調査を行った。 (In this study, an investigation of this problem was conducted.)
• Why: Academic Japanese minimizes personal agency in favor of impersonal constructions. The research, not the researcher, is the grammatical subject.

Informal connectors in formal arguments

• Wrong: だから、この結果は重要である。
• Right: したがって、この結果は重要である。 or そのため、この結果は重要である。
• Why: Casual conjunctions like だから are too informal. Academic writing uses したがって, そのため, ゆえに, and other formal logical connectors.

Incorrect citation formatting

• Wrong: 田中さんが言ったように (As Mr. Tanaka said)
• Right: 田中(2020)によれば (According to Tanaka (2020))
• Why: Academic citations follow specific impersonal patterns. Honorifics and conversational phrasing are inappropriate.

Usage Notes

Japanese academic writing conventions vary somewhat by discipline. Humanities papers may permit more personal voice and literary flourish, while sciences and social sciences adhere strictly to impersonal, passive constructions. The conventions described here represent the mainstream academic norm.

The structural organization of a Japanese academic paper typically follows a pattern similar to Western conventions (introduction, methods, results, discussion) but with distinctive transitional phrases. Opening with 本稿では (in this paper) and closing with 今後の課題として (as future challenges) are expected structural markers.

Register consistency is paramount. A single slip into casual or polite register within an otherwise academic text is immediately noticeable and undermines credibility. When in doubt, err on the side of greater formality and more hedging.

Practice Tips

• Read published Japanese papers in your field. CINII (cinii.ac.jp) and J-STAGE provide free access to thousands of Japanese academic articles. Note recurring phrases and structural patterns, building a personal template of transitional expressions.

• Practice rewriting casual sentences in academic register. Take news articles or blog posts and convert them to academic style by applying である体, nominalization, passive voice, and hedging. This builds fluency with the transformation patterns.

• Build a phrase bank. Collect and categorize academic set phrases by function (introduction, citation, hedging, conclusion, limitation). Having these ready accelerates writing and ensures register consistency.

Related Concepts

• Prerequisite: Formal Written Style --- である体 and formal register foundations are essential before tackling academic conventions
• Next steps: Legal and Official Language --- another specialized formal register with its own fixed patterns