What is SRS? | The Kanji Speedrun

What is Spaced Repetition (SRS)?

The Memory Hack Every Kanji Learner Needs

Mnemonic: 明 (bright)
You worked hard to learn this kanji... will you remember it next week?


Ever feel like kanji just vanish from your memory after a few days? Spaced Repetition (SRS) is the secret weapon to make those memories stick.


🧠 The Forgetting Curve—And How SRS Fixes It

If you don’t review, your memory drops off fast.

Ebbinghaus Forgetting Curve

We all forget new things quickly—that’s just how our brains work! But there’s good news: every time you review *right before* you forget, the memory gets stronger, and you’ll remember it longer each time.

📅 What *is* Spaced Repetition?

SRS = reviewing at smart intervals. Instead of cramming all at once, you see each kanji just as you’re about to forget it.

  • Right after you learn it: review today
  • If you remember it: review in 2 days
  • If you remember again: review in 5 days
  • If you keep getting it right: review a week later, then a month later...

Each review “resets” your memory clock and makes the memory stronger.

Mnemonic: 一 (one)
Reviewing at the right time saves hours of study!

🌱 Example: The Tale of Card 7

Mnemonic: 水 (water)
(Imagine you just learned 水).

On Day 1, you learn the kanji for water. You remember it easily, so you review again in two days. Still easy! You decided you didn't need to review that one.

Suddenly, you forget—was it “water” or “tree”? You mark it wrong. Now SRS kicks in: you’ll see it again tomorrow, not a week from now. Once it’s easy again, the intervals get longer: 10 days, 30 days, 3 months...

This way, you spend more time on what’s hard, and almost none on what’s easy!


🛠️ How Do I Use SRS?

Anki Logo
Anki isn't the only flashcard app, but it's a great one.

Anki is a digital flashcard app—perfect for memorizing kanji, vocabulary, grammar, and more. It uses the same Spaced Repetition System (SRS) technology we've been talking about in this article. It's free to use and offers a powerful way to boost long-term retention.

If you've never heard of Anki or used flashcards before, don’t worry—Anki isn't required. But if you're ready to level up your learning, here’s how to ease into it:

  • Start simple — use our downloadable 5-day review grid to track what you've learned each week.
  • Only add what challenges you — instead of turning everything into a flashcard, focus on kanji you consistently forget. This avoids “deck bloat” and keeps daily reviews light.

Here’s how to begin with Anki:

  • Download Anki (we recommend the desktop version just for initial setup).
  • Import one of our decks after you just finished a chapter.
  • Review a few cards daily, especially the tricky ones.
  • As you recognize information effortlessly, suspend (not delete) easy cards so your review queue stays meaningful.

Remember: the goal isn't endless repetition—it’s smart repetition. Use SRS to target what you’re about to forget, while enjoying real-world exposure through reading, listening, and usage.

🧩 Avoiding SRS Overload: Review Smarter, Not Longer

Mnemonic: 小 (small)
Don’t try to review *everything* forever—focus on the tough stuff!

If you add *every* word or kanji to Anki, your daily reviews will explode. That’s called “card bloat”—and it can burn out even the most dedicated learners.

Remember: Your brain is always reviewing in the background—real exposure, reading, and listening are the ultimate SRS.


📈 Pro Tips for Anki & SRS

✨ TL;DR—Why SRS?


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