Anime got you here. Vocabulary decides whether you stay.

How much longer is Japanese than Spanish, really?

About four times longer, by the only body that measures it consistently. The US Foreign Service Institute trains American diplomats and publishes how many class hours each language takes to reach professional working proficiency. Spanish and Portuguese sit in its easiest band at roughly 600 hours. Japanese sits in the hardest band at 2,200 hours, and inside that band the institute marks Japanese and Korean as harder still than their neighbours.

Those hours are full-time classroom instruction with native-speaking teachers, so they are a floor rather than a forecast for evening study. The useful part is the ratio. If a friend reached comfortable Spanish in a year of steady work, plan for Japanese to take something closer to four.

Knowing the number early is worth more than being spared it. People quit Japanese at month eight because they expected Spanish and got something else. Nobody quits because a language turned out to be exactly as long as they were told.

Where do all those hours actually go?

Into words and the readings attached to them. Japanese grammar is calm by European standards: no plurals, no articles, no gender agreement, and verbs that do not change for person. The sound system is small, with five vowels, no tones, and steady rhythm, so once you know a word you can usually say it.

The cost is written. Japanese runs three writing systems at once. Hiragana covers grammar with about 46 basic characters, katakana handles borrowed words with a matching set, and kanji carries meaning in characters borrowed from Chinese. Japan's Ministry of Education fixes the standard for an educated adult reader at 2,136 joyo kanji, revised in 2010, of which 1,026 are taught across the six years of primary school.

One kanji also carries several readings depending on the word it sits in, which is why the reading is a separate thing to learn from the meaning. That is the memory load Japanese really charges you for, and it is the thing spaced repetition is genuinely good at.

What the JLPT levels mean now that they map to CEFR

Since the December 2025 sitting, JLPT score reports show a CEFR level alongside the result. The Japan Foundation set the mapping from a standard-setting study, and it depends on your score, so one JLPT level can land in either of two CEFR bands.

One caveat travels with it, stated by the JLPT itself: the exam tests reading and listening only, with no speaking or writing section. A JLPT level therefore describes what you can take in, not the full four-skill picture CEFR normally covers.

You will read far more kanji than you will ever write

Typing Japanese works by spelling the sound in kana and choosing the right kanji from a list, so recognition, not recall of the strokes, is what daily life asks for. Japan's Agency for Cultural Affairs has tracked the effect for years: in its 2011 survey 66 percent of people said their handwriting had got worse, and by the 2021 survey about 89 percent said phone and computer typing was wearing down their ability to write kanji accurately by hand.

Native speakers read many more kanji than they could produce with a pen, and they get along fine. The JLPT has no handwriting section at any level either. Recognition first is how Japanese is actually lived now, and it is what a card deck should train.

The head start you already have

Katakana exists largely for borrowed words, and a large share of them came from English. テレビ is a television, コーヒー is coffee, アルバイト is a part-time job by way of German. Learning the 46 katakana characters converts a slice of your first thousand words into words you already know.

Kanji pay a second dividend if you ever touch Chinese. The characters came from Chinese, so a Japanese reader can often work out the topic of a Chinese sentence from the shapes alone, without speaking a word of Mandarin. Pronunciation and grammar drifted apart centuries ago, so it only goes so far, but the overlap is real and it runs in both directions.

JLPT levels, CEFR, and what they mean for work in Japan

CEFR levels come from the JLPT's own score-based mapping, published by the Japan Foundation and shown on score reports from the December 2025 sitting. One JLPT level can span two CEFR bands because the mapping depends on the score. The JLPT tests reading and listening only. Work notes reflect Japanese government sources and industry surveys.

How Koboshi helps with Japanese

• Every card carries the kana reading and a romaji spelling, so a kanji word is never a guess about how to say it.
• Japanese readings on new cards are checked by a second, stronger model before they are stored, because a wrong reading teaches the word wrong.
• Screenshot a manga panel, a menu, or a subtitle line, and the card and its reading are built from the image.
• The concept graph links a kanji word to the same idea in Chinese or any other language you are learning, so the overlap shows up instead of being relearned.
• Scheduling is per language, so Japanese review does not crowd out the language you are also studying.

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