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. Kana Vocab
    3. Y2K

    Y2K

    Y2K

    Y2K (bug)

    NTNounTechnologyKana Vocab

    ワイ・ツー・ケーワイツーケーワイツーケイ

    Noun

    1.
    Y2K (bug), year 2000 problem
    computing
    2.
    the year 2000, the 2000s
    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.

    Explore more

    Kana Vocab dictionary›Browse all entries›