The US government's assessment
The Foreign Service Institute (FSI) — which trains US diplomats in foreign languages — categorises Japanese as a Category IV language: the hardest tier, requiring approximately 2,200 classroom hours for professional proficiency. For comparison, Spanish takes around 600 hours. The FSI explicitly calls Japanese "exceptionally difficult for native English speakers."
But this is classroom-hour proficiency for diplomats — a very high bar. Conversational Japanese, the ability to navigate daily life in Japan and hold meaningful conversations, is achievable significantly faster. The distribution of difficulty matters: some aspects of Japanese are genuinely easy; others are genuinely hard.
What is easy about Japanese
Pronunciation is simpler than most European languages — Japanese has only five vowel sounds and no tones (unlike Mandarin or Cantonese). Grammar has no gender for nouns, no articles (no "a" or "the"), and verb conjugation is regular. Numbers are systematic. Hiragana and katakana can each be learned in one to two weeks. Thousands of English loanwords are already in the language as katakana.
Japanese pitch accent — the rise and fall of pitch within words — is often overlooked by learners focused on grammar and kanji. It does not create meaning differences as dramatically as tones in Chinese, but it does affect naturalness of speech and can occasionally cause misunderstanding. It is worth studying after reaching intermediate level.
What is hard about Japanese
The writing system is the primary difficulty: 2,136 common-use kanji, each with multiple readings and meanings, embedded in a three-script system. Keigo (敬語 — formal register) requires learning an entirely different set of vocabulary and grammar for professional contexts. Sentence-final particles, topic-comment structure, and the frequency of omitting subjects all create comprehension challenges. And the lack of cognates with English means vocabulary must be built from scratch.
The realistic timeline
With consistent daily study: basic conversations in 3–6 months; reading hiragana, katakana, and simple kanji in 6–12 months; independent travel in Japan in 1–2 years; reading novels and watching undubbed film without subtitles in 3–5+ years. Every stage brings new rewards — and the rewards are culturally rich in a way that few language-learning experiences can match.
Start with the basics
Learn hiragana and katakana first — the foundation of Japanese reading.