Have you ever tried using AI to analyze grammar?

Have you ever tried using AI to analyze grammar in sentences in the Foundation or Essentials decks? If you tell it to "Do a word by word analysis of the following sentences" with an example of what you want the format to be, it will produce a pretty nice analysis.

My own experience is that it is about 95% right, but it is so fast. It might be good enough to eliminate the need for learners to add in Tae Kim or something.

With the rise of LLM chatbots, many people have started asking them to explain Japanese, help with learning Japanese, and things like that.

There's nothing wrong with using AI to help you understand Japanese, but there are some caveats. Don't rely on it exclusively. Use it only when other options aren't available. I wouldn't trust AI for grammar explanations. Instead, try to understand sentences intuitively and use the provided translations. If you truly need a grammar explanation, consult a verified source first. See grammar resources for recommended grammar guides. One such resource is the DJT guide grammar master reference.

Now let's cover the problems with asking AI to help you learn a foreign language.

AI explanations can be wrong. In short, LLMs generate text based on probabilities. You give them input and they auto-complete it. They don't actually understand what they produce. It only appears that way. As a beginner, you can't tell if their output is correct. That said, modern LLMs can be quite accurate.

When you ask someone, including an LLM, to explain grammar, you train your conscious brain to analyze Japanese. You request explanations and then try to make sense of them. That's different from absorbing meaning intuitively, as we do with our native language. AI can help you understand, but the neural pathways you build will differ from those of native speakers. In other words, your brain will work differently from native speakers, impeding your ability to think like one. Native speakers acquire grammar naturally through immersion and usually learn explicit rules much later in life.

This is a citation from our guide:

Native speakers perceive language entirely on a subconscious level, so it makes sense that the best way to learn a language is through immersion. When you analyze the language by studying grammar rules, you end up using completely different parts of your brain than native speakers do. Once your brain gets used to perceiving language through that analytical lens, it's nearly impossible to revert. At best, you can train yourself until it becomes automatic, but it will still feel different from a native speaker.

Focus on watching anime. It's probably the easiest way to acquire the language naturally. If you use AI, ask it to give your more example sentences rather than explain grammar. Humans acquire language by understanding messages. What is being said, not how it's said. Remember that when you analyze sentences, you activate your analytical brain, not the natural, intuitive one.

Until you go monolingual, it's a good idea to translate monolingual dictionary definitions with an LLM. That lets you use native-Japanese definitions (e.g., Daijirin, Meikyo) instead of relying only on JMdict/Jisho entries.

For example, the word 奇抜 often appears in anime or books. Jmdict lists synonyms like: unusual; unconventional; eccentric; novel; original; striking; bizarre; wild. That helps, but a monolingual definition gives clearer nuance.

明鏡 (Meikyo) definition and examples:

思いも及ばないほどすぐれていること。また、人の意表をつくほど風変わりなこと。
「着想が奇抜だ」
「奇抜なデザイン」

Machine-translated:

Something extraordinarily original or striking.
Far beyond what you'd expect.
It can also mean unusually eccentric or surprising.

Examples:
"The concept is unconventional."
"A striking/eye‑catching design."

This kind of translated monolingual definition usually conveys nuance better than a bare list of synonyms.

Finally, a big problem is that AI doesn't talk like humans. You've probably noticed this in English, and it's true in other languages too. AI sounds emotionless and formal, academic in tone. It's too perfect, lifeless, and boring. Sentences are often long and convoluted. Talking with an LLM can make you pick up that style of writing. You don't want to consume that kind of input, especially when authentic alternatives exist. For grammar, you can simply open a DoJG reference and read example sentences. Or just watch more anime.