Everyone says learning kanji takes years. I wanted to test that. Could I learn 100 kanji in just 7 days using modern tools and methods? Not just “see them once” — actually recognize them, know their meaning, and recall at least one reading each.
Here’s exactly what happened, day by day. No sugar-coating.
The Rules
- 100 new kanji in 7 days (roughly 14-15 per day)
- Must be able to: see the kanji → recall meaning + at least one reading
- Using SRS flashcards (Kanjijo) as the primary tool
- Maximum 2 hours of study per day — no all-nighters
- Final test on Day 8: write all 100 meanings from memory
The Method
I didn’t just brute-force memorization. Here’s the system:
- Morning (30 min): Learn 14-15 new kanji using Kanjijo’s JLPT N5 and N4 lessons. Study each kanji’s meaning, readings, stroke order, and related vocabulary.
- Lunch break (15 min): First SRS review of the morning batch. Mark any failures for extra review.
- Evening (30 min): Full SRS review of all accumulated kanji (new + previous days). This is where spaced repetition does its magic.
- Before bed (15 min): Quick recall test using the quiz feature. No peeking.
Total daily time: ~90 minutes. Far less than “traditional” rote methods would require for 14-15 kanji, because SRS automatically prioritizes the ones you’re struggling with.
Day-by-Day Breakdown
Day 1: Easy Mode (15 kanji)
Started with the simplest N5 kanji: 一 二 三 四 五 六 七 八 九 十 日 月 火 水 木. Numbers plus basic elements. Felt great. 100% recall by evening.
Confidence level: 10/10. “This is going to be easy.”
Day 2: Still Cruising (30 total)
Added: 金 土 人 大 小 中 上 下 左 右 前 後 山 川 田. Directions, size, nature. The stroke order practice helped — writing each kanji 3 times burned the shape into muscle memory.
Evening SRS review: Day 1 kanji = 100% recall. Day 2 = 93%. Two kanji (後 and 前) kept getting mixed up.
Confidence level: 9/10.
Day 3: The First Cracks (45 total)
New batch: 年 学 校 先 生 名 女 男 子 花 見 食 飲 読 書. More complex now. 学 and 字 look similar. Evening review of ALL 45: got 38 right (84%).
The SRS was already helping — it kept showing me 後, 前, 学 at shorter intervals because I kept failing them. By bedtime review, I got 42/45 (93%).
Confidence level: 7/10. Starting to feel the accumulation.
Day 4: The Wall (60 total)
This was the hardest day. New kanji were getting more abstract: 会 社 電 車 駅 間 時 分 半 毎 今 何 気 天 雨. Evening review of 60 kanji: only 71%. I was mixing up similar-looking ones and forgetting readings.
Low point: stared at 電 for 30 seconds and couldn’t remember if it was “electricity” or “rain.” (It’s electricity. 雨 is rain. The radical 雨 is literally inside 電.)
Confidence level: 4/10. Seriously considered quitting.
Lesson learned: Day 4 is when most kanji learners quit. The initial easy wins are gone, and the accumulation of reviews feels overwhelming. This is exactly where SRS earns its reputation — it won’t let you forget what you’ve learned, even when your brain wants to.
Day 5: Recovery (75 total)
Woke up and immediately reviewed yesterday’s failures. Something had clicked overnight — sleeping on it actually helped. Morning review: 85% across all 60 previous kanji. The overnight consolidation was real.
New batch: 行 来 帰 出 入 休 話 聞 言 語 手 足 目 耳 口. Body parts and verbs. These were easier because they’re high-frequency words I’d seen in anime.
Confidence level: 6/10. Back on track, but the review pile was growing.
Day 6: The Review Avalanche (90 total)
The SRS queue was now 90+ items deep. Morning review took 45 minutes instead of 30. But the data was encouraging:
| Day Learned | Recall Rate | Notes |
|---|---|---|
| Day 1 (1-15) | 100% | These are locked in permanently |
| Day 2 (16-30) | 97% | 後 still occasionally trips me up |
| Day 3 (31-45) | 91% | Solid |
| Day 4 (46-60) | 82% | These need the most work |
| Day 5 (61-75) | 87% | Surprisingly strong — high-frequency advantage |
New batch: 長 高 安 新 古 多 少 早 近 遠 白 黒 赤 青. Adjectives. Easier to remember because they pair naturally: 大↔小, 高↔安, 新↔古.
Confidence level: 7/10.
Day 7: The Final Push (100 total)
Last 10 kanji: 友 好 思 知 待 持 使 作 住 買. These are common verbs and concepts. By now, my brain was in “kanji mode” — I could see the radicals and guess meanings before checking.
Final evening review of ALL 100: took 55 minutes. Intense but satisfying.
Confidence level: 8/10.
Day 8: The Final Test
I printed all 100 kanji on paper, shuffled them, and went through one by one. For each one, I had to write the meaning and at least one reading.
Results
| Metric | Score |
|---|---|
| Correct meaning | 89/100 (89%) |
| Correct reading | 79/100 (79%) |
| Both correct | 76/100 (76%) |
| Completely blank | 4/100 (4%) |
What Worked
- SRS was non-negotiable. Without it, I’d have forgotten 50% by Day 4. The algorithm kept cycling failures back at the right intervals.
- Morning + evening split. Reviewing twice daily with sleep in between dramatically improved retention overnight.
- Stroke order practice. Writing each kanji engaged muscle memory. I could “feel” kanji I’d forgotten visually.
- Learning in semantic groups. Opposites (大↔小), related concepts (日月火水木金土), and themed batches stuck better than random ordering.
What I’d Do Differently
- 10 per day, not 14-15. The optimal pace for long-term retention seems to be fewer new cards with more review time.
- More vocabulary per kanji. Knowing that 食 means “eat” is one thing. Knowing 食べる, 食堂, 和食 makes it three times stickier.
- Start the quiz feature from Day 1. I only discovered the test mode on Day 5. Active recall testing from the start would have caught weak spots earlier.
The 2-Week Follow-Up
Two weeks after the challenge, I retested myself. Result: 82/100 meanings correct, only 7 fewer than Day 8. The SRS foundation held. The kanji I’d reviewed most heavily during the challenge were the most durable.
The takeaway? You can learn 100 kanji in a week — but the real magic is what happens in the weeks after, when SRS transforms short-term recognition into permanent knowledge.
Kanjijo’s SRS flashcards make it possible. Start your own challenge today — free.
Frequently Asked Questions
Can you really learn 100 kanji in a week?
Yes, you can recognize 100 kanji in a week with intense study. True mastery (reading, writing, using in context) takes longer. After 7 days, expect ~75-90% recognition rate. Continued SRS review over the following weeks locks it in permanently.
How many kanji should you learn per day?
For sustainable, long-term learning: 5-10 new kanji per day. This allows proper SRS cycling and prevents burnout. The 14-15/day pace in this challenge was intense and not for everyone — but it proved the upper limit is higher than most people think.
What’s the best method to learn kanji fast?
Combine visual mnemonics + SRS + active recall testing. Learn each kanji’s radical components first, create a story linking them to the meaning, then review using SRS flashcards. Apps like Kanjijo automate the scheduling so you focus on actual learning.