Anki — the free spaced repetition flashcard software — is the single most recommended tool by advanced Japanese learners, and the single most misused by beginners. Most people either don't use it at all or use it inefficiently. The learners who make the fastest progress use Anki in a very specific way, with specific deck types tailored to different aspects of Japanese. Here is the exact setup that works.
The kanji recognition deck shows you a kanji on the front and tests your ability to produce its meaning (and keyword, if using RTK). Keep this separate from vocabulary and readings. Recommended pre-made deck: the Core RTK deck on AnkiWeb if you're using the Heisig method. Card format: kanji on front → keyword/meaning on back. Daily new cards: 10-20 maximum until the pile of reviews doesn't overwhelm you. This deck is long-term — you'll maintain it throughout your entire Japanese study journey.
The Core 2k/6k/10k decks on AnkiWeb contain the most common Japanese words ranked by frequency, with example sentences and audio. The Core 2000 covers the vocabulary needed for basic communication; Core 6000 reaches comfortable everyday literacy. Card format: Japanese sentence with the target word highlighted on front → meaning + reading on back. Audio is essential — always hear the word pronounced correctly. This deck teaches vocabulary in context rather than isolation, which dramatically improves retention and usability.
The most powerful deck type for intermediate and advanced learners: cards you create yourself from Japanese media you're consuming. When you encounter an unknown word in a drama, book, or podcast, create an Anki card with that exact sentence as context. Add audio from the source if possible. These personal mining cards are more memorable than any pre-made deck because you encountered the word in something you cared about. The Yomichan browser extension automates much of this process for reading Japanese online.
Listening cards have audio on the front (no text) and the sentence + translation on the back. These train your ear specifically — you have to understand the Japanese from sound alone before you can check the answer. Include these once you have basic vocabulary and want to push your listening comprehension. Create them from drama or podcast clips using tools like Subs2Anki.
The Bottom Line: The most effective Anki setup for Japanese uses 4 deck types: kanji recognition (RTK-style), core frequency vocabulary with audio, personal sentence mining cards from content you consume, and listening-focused audio cards. Do reviews daily without fail — consistency with Anki matters more than any other variable. Limit new cards to a sustainable daily number; review backlogs are the main reason people abandon Anki.