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Kotomora
The Japanese dictionary that explains how words are used
Kotomora is a modern Japanese dictionary built for learners who want more than quick definitions. Search in Japanese, English, romaji, or handwriting; analyze complete sentences; and understand nuance through usage notes, natural examples, pitch accent, conjugations, related words, kanji details, and translation guides. Available free on the web, iOS, and Android.
Hey Product Hunt! 👋 I’m Jeff, the solo developer behind Kotomora.
I’m currently studying Japanese in Tokyo, and I built Kotomora because I kept running into a problem with conventional dictionaries: definitions answered the first question—“What can this word mean?”—but often not the more important ones:
- Which word fits this particular situation?
- How is it actually used?
- How is it different from similar words?
- Why does this sentence mean what it does?
Kotomora is my attempt to bring those answers together in one place.
With Kotomora, you can:
🔎 Search in Japanese, English, romaji, kana, kanji, or by handwriting
🧩 Break down complete sentences into vocabulary and grammar
📖 See distinct meanings with natural examples, pitch accent, conjugations, frequency, and JLPT information
🔗 Explore synonyms, easily confused words, word families, related kanji, and common usage patterns
🗣️ Use translation guides to understand how English ideas map to natural Japanese
🗂️ Browse vocabulary by JLPT level, part of speech, theme, and collections such as onomatopoeia, idioms, proverbs, and keigo
Kotomora is free on the web, iOS, and Android. I built the entire product myself while attending Japanese language school, and this is still only the beginning.
My longer-term goal is to create a complete platform for understanding Japanese: reference tools that answer questions at the moment they arise, combined with learning tools that teach the same information in a coherent sequence.
I’d especially love feedback from Japanese learners, language-tool makers, and anyone interested in dictionaries or search:
What feels immediately useful? What is still confusing? What would make you come back regularly?
Thanks for checking out Kotomora! 🙏
About Kotomora on Product Hunt
“The Japanese dictionary that explains how words are used”
Kotomora was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #79 on the daily leaderboard. Kotomora is a modern Japanese dictionary built for learners who want more than quick definitions. Search in Japanese, English, romaji, or handwriting; analyze complete sentences; and understand nuance through usage notes, natural examples, pitch accent, conjugations, related words, kanji details, and translation guides. Available free on the web, iOS, and Android.
On the analytics side, Kotomora competes within Education, Languages and Online Learning — topics that collectively have 96.9k followers on Product Hunt. The dashboard above tracks how Kotomora performed against the three products that launched closest to it on the same day.
Who hunted Kotomora?
Kotomora was hunted by Jeff Senecal. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Kotomora including community comment highlights and product details, visit the product overview.
Jeff Senecal