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这是什么What is this

「日语语法笔记」是一份免费、双语（中文 + 日语）的 JLPT N5 → N2 语法学习材料，按 8 周节奏规划，共 73 课、400+ 个语法点。每个语法点包含：

  • 接续规则：动词 / 形容词 / 名词的具体接续方式
  • 3+ 例句：覆盖日常对话和考试常见语境
  • 辨析：和易混淆语法的对比（如「は」vs「が」、「たら」vs「なら」）
  • 易错点：中文母语者特别容易踩的坑
  • 间隔复习：当天 → 1 → 4 → 7 → 14 → 30 天勾选清单

内容免费、无广告、无追踪。

"Japanese Grammar Notes" is a free, bilingual (Chinese + Japanese) JLPT N5 → N2 grammar study set, structured as an 8-week curriculum of 73 lessons covering 400+ grammar points. Each grammar point includes:

  • Conjugation rules: how it combines with verbs / adjectives / nouns
  • 3+ example sentences: covering daily conversation and exam-style contexts
  • Comparisons: side-by-side with easily confused grammar (e.g. は vs. が, たら vs. なら)
  • Common pitfalls: mistakes Chinese native speakers tend to make
  • Spaced repetition: review checklist for day 0 → 1 → 4 → 7 → 14 → 30

Free, no ads, no tracking.

为什么做这个Why I built it

我从 2026 年 4 月开始系统学日语，目标 8 周内拿下 JLPT N2。准备过程中发现：

  • 中文圈的日语语法资料要么过于碎片化（散落在各种论坛、知乎回答），要么过于学院派
  • 教科书（《大家的日本语》《新完全マスター》等）对中文母语者来说，「中文翻译」和「中文讲解」之间有断层——很多语感差异翻译里讲不清楚
  • 没有一份完整覆盖 N5 → N2、又用中文母语者视角讲解的免费在线资料

所以我决定边学边记，把整套笔记开源出来。最初是给自己复习用，后来发现可能对其他中文母语日语学习者也有用，于是托管成网站。

I started studying Japanese seriously in April 2026, aiming for JLPT N2 in 8 weeks. While preparing, I noticed:

  • Chinese-language Japanese grammar material online is either too fragmented (scattered across forums and Q&A sites) or too academic
  • Textbooks (Minna no Nihongo, Shin Kanzen Master) leave a gap between "Chinese translation" and "explanation tuned for Chinese speakers" — much of the nuance gets lost
  • No single resource covers N5 → N2 completely while explaining from a Chinese-native-speaker perspective

So I decided to take notes as I learn and open-source everything. It started as a personal study aid; publishing it as a website was a side effect.

关于作者About the author

  • GitHub：Ralphbupt
  • 邮箱：pengcheng199@gmail.com
  • 这是个人项目，无团队、无商业目的
  • 目前 JLPT 级别：学习中（按本站节奏从 N5 推进到 N2）
  • 反馈渠道首选 GitHub Issues（公开追踪、其他读者也能看到），邮箱用于一对一的隐私沟通
  • GitHub: Ralphbupt
  • Email: pengcheng199@gmail.com
  • This is a personal project — no team, no commercial intent
  • Current JLPT level: studying (progressing N5 → N2 along with this site)
  • Preferred channel: GitHub Issues for public tracking; email for private discussion

内容生产方式How content is produced

每节课的笔记结构来自我自己学日语的实际节奏。例句和辨析参考了：

  • 教科书：《大家的日本语 初级 I / II》、《新完全マスター 文法 N3 / N2》、《日本語総まとめ N3 / N2 文法》
  • 在线参考：沪江日语、Bunpro、Tofugu、日本語教師の広場
  • 真题：JLPT 历年 N5 - N2 文法真题（公开发布部分）

每个语法点完成后，会在我自己的学习中先验证 2-3 周（用配套的间隔复习清单），确认讲解清晰、例句到位之后再公开发布。

如果你发现某个例句直接来自上述资料而我没标注出处，请提 issue，我会立刻修正。

The lesson structure follows my actual study pace. Example sentences and comparisons reference:

Each grammar point is validated through 2–3 weeks of my own study (using the built-in spaced-repetition checklist) before being published.

If you find an example sentence that directly comes from a referenced source without proper attribution, please file an issue — I'll fix it immediately.

站点开源Open source

整个站的源代码（build 脚本、全部 markdown 内容）都在 GitHub：

https://github.com/Ralphbupt/japanese-grammar

技术栈：

  • marked：Markdown → HTML
  • kuroshiro + kuromoji：自动给汉字加 furigana 注音
  • sharp：生成 OG 图片
  • GitHub Pages + Cloudflare Registrar：托管 + 自定义域名 jpnotes.dev

完全静态站点，无后端、无数据库、无 cookies。每次推送 main 分支，GitHub Actions 自动构建并部署。

The full source code (build scripts, all markdown content) is on GitHub:

https://github.com/Ralphbupt/japanese-grammar

Tech stack:

  • marked: Markdown → HTML
  • kuroshiro + kuromoji: automatic furigana annotation on kanji
  • sharp: OG image generation
  • GitHub Pages + Cloudflare Registrar: hosting + custom domain (jpnotes.dev)

Pure static site — no backend, no database, no cookies. Every push to main triggers a GitHub Actions build and deploy.

「问 AI」功能的隐私与安全"Ask AI" privacy & security

课程页右上角的 🤖「问 AI」侧栏可以把当前课的内容连同你的问题发给一个大模型。它的设计原则是：本站永远拿不到你的密钥，也看不到你的对话。

  • 没有服务器。 整站是 GitHub Pages 上的静态 HTML，没有后端、没有数据库。你填的 API key 只存在你这台设备的浏览器里（默认 localStorage；勾选「只在本次会话保存」则关闭标签页即清除）。
  • 请求直连服务商。 提问时，你的浏览器把这一课的正文和你的问题直接发到你选的服务商（Anthropic、OpenAI、DeepSeek、通义千问……或你本机的 Ollama）。中间没有任何中转。
  • 浏览器层面的白名单。 每个页面都带有 Content-Security-Policy 的 connect-src 规则，只允许连接本站、Google Analytics、预设的服务商域名，以及 localhost / 127.0.0.1。即使页面上某段脚本被篡改，浏览器也会拒绝把数据发往白名单之外的任何地址。
  • 明文保护。 设置里只接受 https:// 或本机地址；把服务商地址改成非官方域名时会显示醒目警告。
  • 自行验证。 按 F12 打开开发者工具的 Network 面板，再提一个问题：你只会看到对该服务商域名的请求。侧栏的全部源码只有一个文件，欢迎审阅。
  • 本地方案。 想完全不出本机，用 Ollama / LM Studio 跑本地模型即可，浏览器只会访问 localhost。

费用由你和服务商结算，本站不参与、不抽成。

The 🤖 "Ask AI" side panel on lesson pages sends the current lesson plus your question to a large language model. Its design rule: this site never receives your key and never sees your conversation.

  • No server. The whole site is static HTML on GitHub Pages: no backend, no database. Your API key exists only in your browser on your device (localStorage by default; tick "keep for this tab only" and it is cleared when the tab closes).
  • Direct to the provider. When you ask, your browser sends the lesson text and your question straight to the provider you picked (Anthropic, OpenAI, DeepSeek, Qwen… or Ollama on your own machine). Nothing sits in between.
  • A browser-enforced allowlist. Every page ships a Content-Security-Policy connect-src rule that only permits connections to this site, Google Analytics, the preset provider hosts, and localhost / 127.0.0.1. Even if a script on the page were tampered with, the browser would refuse to send data anywhere else.
  • No plain-text keys. Settings accept only https:// or local URLs, and changing a provider's host to a non-official domain shows a prominent warning.
  • Verify it yourself. Open DevTools (F12) → Network and ask a question: the only requests you will see go to that provider's domain. The panel's entire source is one file; reviews welcome.
  • Fully local option. To keep everything on your machine, run a local model with Ollama or LM Studio; the browser then only talks to localhost.

Billing is between you and the provider; this site takes no part and no cut.

播客Podcast

Japanese Daily News 是本站的姊妹播客——慢速日语新闻 + 英语解说，帮助学习者边听边学。网站上提供逐句精听、transcript 和 furigana 标注，Spotify / Apple Podcasts 同步更新。

Japanese Daily News is our companion podcast — slow Japanese news with English commentary, designed for learners. The website offers sentence-by-sentence listening, transcripts with furigana, while episodes are also available on Spotify / Apple Podcasts.

反馈与贡献Feedback and contributions

发现错别字？例句别扭？讲解不清楚？

我会回复每一个反馈。

Found a typo? Awkward example? Unclear explanation?

  • GitHub Issues: open an issue — recommended, publicly tracked
  • GitHub PR: submit a fix directly; additions to examples and comparison notes especially welcome
  • Email: pengcheng199@gmail.com

I respond to every piece of feedback.

许可License

内容采用 CC BY 4.0 许可：

  • ✅ 自由分享、引用、改编、用于教学（包括商业教学）
  • ✅ 标注来源即可（链接到 jpnotes.dev）
  • ❌ 不要做全站镜像——会稀释 Google 索引，对原站和镜像都没好处。引用任意片段、章节都欢迎，但请不要批量复制整个语法点列表

Content is licensed under CC BY 4.0:

  • ✅ Free to share, quote, adapt, use for teaching (including commercial teaching)
  • ✅ Just attribute the source (link to jpnotes.dev)
  • ❌ Please don't mirror the entire site — full mirrors dilute Google's index and hurt both the original and the mirror. Quote any snippet or chapter freely, but please don't bulk-copy the entire grammar point catalog