5 Common Mistakes English Speakers Make in Japanese

After teaching more than 5,000 Japanese lessons since 2018, I have noticed certain mistakes that appear again and again, regardless of their native language or age.

The good news is that these mistakes are completely normal. In fact, many of them occur because learners are trying to apply patterns from languages they already know.

Here are five of the most common mistakes I see in my lessons.

1. Using English Word Order in Japanese

One of the most common mistakes English speakers make is using English word order in Japanese.

This is completely understandable. When I studied Italian several years ago, I could often rely on English word order because the two languages are similar. Japanese, however, is very different.

Here are some examples I often hear:

・”early in the morning → 早く朝

・”late at night” → おそく夜

・”4 p.m.” → 四時午後

Even intermediate learners who can use advanced vocabulary sometimes make these mistakes. Learning new words is often easier than changing deeply ingrained habits about word order.

2. Assuming One English Word Has One Japanese Equivalent

Another common mistake is assuming that a single English word always corresponds to a single Japanese expression.

Many learners initially translate:

・"to" as に

 ・"for" as ために

 ・"according to" as によると

This approach often works at the beginner level, but it becomes less reliable as learners progress.

One of my students who works in the tech industry used to rely on によると whenever she wanted to say "according to" in English. Over time, she learned to use によると only to indicate a source of information, while the English phrase "according to" can be used in a much wider range of situations.

The same thing happens with verbs. At the beginner level, "eat" is usually 食べる and "use" is usually 使う. Later, as learners move beyond the beginner level, many are surprised to discover that knowing these basic verbs is not always enough.

Even to describe everyday activities such as eating out or using something up, they often need to learn entirely new Japanese words.

Learning Japanese is not simply a matter of replacing English words with Japanese ones.

3. Dropping Every Particle in Casual Speech

After mastering basic grammar, many learners want to sound more natural.

One strategy they often try is dropping particles because they hear native speakers doing it in casual conversation.

One of my students said:

来月、友だち東京行く。

Without clear context, this sentence could have more than one meaning.

It could mean:

• My friend is going to Tokyo next month.

• I am going to Tokyo with my friend next month.

This is when I explain that some particles can be omitted, but not all of them. Learning which particles can be dropped—and when—is an important part of developing natural Japanese.

4. Omitting Information That Should Not Be Omitted

Another thing learners often try when they want to sound more natural is omitting information.

For example, one of my students said:

きのう、しました。

When she saw the confused look on my face, she quickly realized that something was missing.

Japanese speakers frequently omit information that has already been established in a conversation. However, some learners assume that anything can be omitted as long as the listener can figure out the meaning.

In reality, there are limits to what can be left unsaid. Knowing what information can be omitted—and what information still needs to be expressed—takes time, observation, and practice.

5. Ignoring Sentence-Ending Particles

One of the most overlooked aspects of Japanese is the use of sentence-ending particles.

Many learners focus heavily on grammar and vocabulary but pay little attention to particles such as ね, よ, の, and かな. As a result, their Japanese may be grammatically correct while still sounding unnatural in conversation.

One of my students is highly motivated to improve his casual Japanese because his goal is to sound more like a native speaker. He uses casual verb forms very well, but he often forgets sentence-ending particles.

For example, he said:

先生、紅茶が好きだ。

This sentence is grammatically correct. However, many native speakers would naturally say:

先生、紅茶が好きだね。

The difference may seem small, but sentence-ending particles play an important role in making Japanese sound natural and conversational.

They are often the missing piece that helps learners move from correct Japanese to natural Japanese.

Final Thoughts

Most of these mistakes are difficult to learn from textbooks alone.

The best way to overcome them is through exposure to natural Japanese, regular conversations with native speakers, and feedback on your own Japanese. Over time, learners begin to notice patterns that are difficult to explain but essential for sounding natural.

That is how correct Japanese gradually becomes natural Japanese.

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