The Learner Text Evaluator jWriter is a system that automatically checks your writing. These are some things you can do here.

• First use Text Evaluation. See your level of writing on a 5-point comprehensive or 4-point logicality scale.
• If your composition level is higher than intermediate, you can use the AI diagnostics. This will be helpful when rewriting your essay because it will give you feedback on your content as well as grammar and vocabulary.
• jWriter has instructions in Japanese and English.

If the following sound familiar, this site is for you.

• You're practicing essay writing but you don't have a teacher or friend to give you comments or feedback.
• You've written an essay for homework. You want to check and rewrite your essay to improve it before handing it in.

This content is part of the jReadability PORTAL.

How to...

This site has instructions in Japanese or English.Select your language from the upper right.

First check your level of essay writing.
The text you enter should be 300 characters or more. As an example, we entered an essay of roughly 1,000 characters.
Click RUN to see your results.

Text Evaluation

The holistic (comprehensive) evaluation shows your level of writing.
There are five levels of assessment: Pre-elementary, Elementary, Intermediate, Advanced, and Superior.
※Regarding levels, please refer to the descriptions on the chart.

The logicality evaluation (analytics) shows whether your essay is logical. It has four levels: Excellent, High, Medium, and Low.
Logical structure is calculated when you enter 1,000 characters or more.
※※Please read About Logical Structure.

You can get quick advice about how to write a better essay.

●Points about diagnostic evaluation of word usage
Variety of words → How was your word diversity?
Kango frequency → Did you use many kango words?
Sentence complexity → Did you have many long sentences? Did you have many short sentences?
High-level words frequency → How often did you use difficult words?

●Key points of logicality evaluation (analytics)
Use of Conjunctives → Were you able to use connective expressions effectively and appropriately? Did you use too many? Did you use too few?
Use of Basic Words → Which did you use more of, easy words or specialized, difficult vocabulary? If you want to make logical sentences, it's a good idea to use specialized words.
Use of Nouns → Did you use just the right amount of nouns? Did you use too many? Did you use too few?

Read the comments to know how to be careful next time!

AI Diagnostics

If your Text Evaluation is Intermediate, Advanced, or Superior, you may use AI Diagnostics.

AI Diagnostics uses AI-powered feedback. Use the feedback as reference to help you improve your writing skills. You can improve your writing skills by thinking about it yourself when you rewrite.


Here, choose from 1. Content Feedback and Revision, 2. Grammar and Vocabulary Feedback, and 3. Essay Comparison.
Start with 1. Content Feedback and Revision.

It will tell you the strengths and weaknesses of your content and structure, as well as areas that need improvement.
Read the comments and think about how to rewrite.

For more specific suggestions, try 2. Grammar and Vocabulary Feedback.

Receive feedback on each sentence.Read specific examples of rewriting.

3. Essay Comparison allows you to compare your writing with the AI-powered revision.

Think about how the two writings differ and how you can rewrite your essay.


Using this system to check and rewrite, you can improve your writing skills without help from anyone else!