Japanese flashcard and SRS resources

Spaced repetition answers a narrow question: when should this item come back? It does not decide whether the item is worth learning, whether the prompt tests useful recall, or how the knowledge will show up in real Japanese.

That makes the first decision less technical than it sounds. Choose what you want the review loop to hold.

Start with the material

“I want ready-made Japanese review with little setup”

Inku is an iPhone app made and operated by our team, with prepared kana, vocabulary, phrase, audio, and spaced-review material. It is a lower-setup companion, not a custom card workshop or full Japanese curriculum.

“I want to remember words and sentences I encounter”

Choose a flexible card system. Anki is the reference point: you can create or import cards, control fields and templates, include audio and images, and use a modern FSRS scheduler. The cost is ownership of the whole system: material selection, card quality, maintenance, and settings.

“I want a fixed path through kanji”

WaniKani supplies radicals, mnemonics, kanji, vocabulary, unlock order, and review timings. It trades flexibility for a coherent sequence. This is useful if designing a kanji plan is the thing preventing you from starting.

“I understand grammar explanations but cannot retrieve the pattern”

Bunpro puts grammar and vocabulary into typed-answer reviews with sentences and structured study paths. It is closer to a grammar practice layer than a blank flashcard system.

“I want one guided environment for several Japanese jobs”

MaruMori combines a structured path with grammar lessons, reading exercises, kanji, vocabulary, study lists, and multiple SRS exercise types. The advantage is continuity; the tradeoff is a larger environment and subscription commitment.

The setup spectrum

You want…	Start by reading	Main tradeoff
Ready-made iPhone review	Inku	No custom-card depth; iPhone only
Total control over cards	Anki	You build and maintain the system
A fixed kanji sequence	WaniKani	You accept the order and review rhythm
Grammar retrieval practice	Bunpro	It complements rather than replaces broad input
A broad guided platform	MaruMori	More surface area and a paid commitment

If your choice is between building your own recall system and following a kanji path, go directly to Anki vs WaniKani. If you want the full field, use the focused SRS shortlist.

Keep SRS in its proper place

An item can become easy to answer on a card while remaining hard to notice in speech or a paragraph. Retrieval practice is useful, but the prompt format becomes part of what you learn.

Pair the review loop with the real task:

• vocabulary cards with reading and listening;
• kanji study with words in sentences;
• grammar reviews with production and comprehension;
• phrase cards with audio and actual conversational contexts.

The review tool preserves access to knowledge. Japanese outside the review screen teaches you when and how to use it.

A safe starting load

New cards are promises to your future self. The queue grows after the excitement of adding material has passed.

Start with a daily amount that feels almost too small, often five new items or even zero while you learn the interface. After ten to fourteen days, look at the entire daily load, not just the new-card count. Increase only when reviews still fit an ordinary bad day.

Our SRS without burnout guide gives a practical reset and pacing method.

The best SRS setting is not the one that maximizes theoretical retention. It is the one that keeps useful material available without pushing reading, listening, and life out of the week.

A one-week fit test

Do not compare five tools at once. Pick one role and run a narrow test:

1. Add or unlock a very small amount of material.
2. Complete reviews at roughly the time you could sustain on workdays.
3. Notice how wrong answers feel: informative, annoying, or ambiguous?
4. Check whether you want to return after the novelty fades.
5. Stop adding lessons for a day and see whether the queue remains understandable.

At the end, the useful question is not “Was the app impressive?” It is “Did this make the target material easier to retrieve without making the rest of Japanese study harder to do?”