三つの札The three tiles

Three kinds of flip-card — the same rich back faces used in Nihongo Dominos. Tapping an underlined word opens its vocabulary or kanji card (whichever the link mode is set to); a sentence's 📖 opens its grammar. (There's no Kana tile — kana is a beginner reference that lives only in Dominos.)

語彙Goi · Vocabulary

The word's reading and meaning, an example sentence with furigana, and a usage note where there's a non-obvious nuance. Content words inside the example are themselves tappable — jump to a related word and back without losing your place. A speaker icon reads the headword aloud.

7,200+ entries · ≈98% of the words in everyday text

漢字Kanji · Characters

The character rendered as a vector glyph with each radical component colored differently. A ▶ button animates the stroke order; tappable radical chips open other kanji that share a radical; an 例 Examples button surfaces the most-frequent Goi compounds containing the kanji. Each card carries a short mnemonic tying the radicals to the meaning.

2,228 kanji · ≈97% of the kanji in everyday reading

文法Bunpou · Grammar

One specific grammar pattern per card — its form, what it means, and an example sentence with furigana. These are the tiles the per-sentence 📖 icon collects, so you can read a line's grammar pattern by pattern.

502 patterns · ≈94–96% of the grammar in general texts

Those aren't arbitrary lists. Together the three cover roughly 94–98% of the vocabulary, kanji, and grammar in everyday Japanese — and the stories are written from exactly this pool. Learn what's here and you've met the high-frequency core that does most of the work in real text; the long tail beyond it is rare by definition.

日本語読書 · NihonGO Dokusho