Kumi logo
Kumi

Learn Japanese. Where understanding folds into fluency.

Dictionary

KanjiKanji vocabularyKana vocabularyKanaRadicalsGrammarJLPT N5

Learn

GuidesData reportsStart where you areWhat is KMT?RoadmapFAQ

Connect

EmailDiscordInstagramThreadsTikTokYouTubeLinkedInBlueskyX

Newsletter

Start learning free →

Free forever tier. No card required.

© 2026 Kumiai Inc. All rights reserved.

AboutFAQContactStatusPrivacyTermsAttributions
    Dictionary
    1. Dictionary
    2. Kanji Vocab
    3. デコ助

    デコ助

    デ​コ​助すけ

    big forehead

    NTNounEmotions & PsychologyUsually kanaKanji Vocab14 strokes

    でこ助凸助

    デコすけでこすけデコスケ

    Noun

    1.
    big forehead, fivehead, asshole
    derogatoryword usually written using kana alone

    Stroke 0 / 14

    Speed1.0x

    Characters that make up this word

    助
    たす.ける・たす.かる・す.ける・すけ…(1)
    help・rescue・assist
    Kanji
    デ
    de
    Kana
    コ
    ko
    Kana
    Kumi logo

    Track your mastery

    Kumi's KMT system tracks your mastery across kanji, vocabulary, grammar, and reading. Create a free account to use it on 220,000+ concepts.

    Related concepts for this entry

    Used in vocabulary

    • 助
    • デ
    • コ

    Explore more

    Kanji Vocab dictionary›Browse all entries›