Hi, all! 
Today, I have an announcement regarding N1 Grammar. Now, you can learn N1 Grammar in Japanese!
Purpose 
This is a new feature for N1-level learners who want to study grammar in Japanese. By learning in Japanese, you won’t have to switch between English and Japanese during your studies, which allows you to keep your brain in ‘Japanese mode’ and helps you to think in Japanese.
Are there any differences between English and Japanese? 
We translated English write-ups into Japanese, so the structure and information remain the same. However, while the original English write-ups are written from the perspective of English speakers for English speakers, we had to modify the Japanese write-ups a bit.
For example, we often compare English and Japanese in our write-ups, but in the Japanese version, we had to remove the explanation that use English meanings.
Our translation goals are (1) to have zero English in Japanese write-ups (and we have successfully written 99.9% in Japanese) and (2) to ensure natural Japanese. So, please note that sometimes the translations may not be 1:1 literal translations.
What is the level of Grammar and Vocabulary? 
We use only the grammar that users have already learned at each level. Regarding vocabulary, we use words that are listed on our N5 to N1 vocabulary lists as much as possible. However, there may be a few words that are not on those lists although they are still commonly used. If you find any of them too difficult or if there’s anything we missed, please let us know! We’re always open to modify and improve our contents.
How to switch between English and Japanese? 
Just click the button at the top-right corner of the write-ups box! You can find this switch on every grammar page. Once you change the language, the setting will be applied to all other grammar pages.
Is the Japanese available only N1? 
Yes, the Japanese write-ups are currently available only for N1 grammar. However, if this feature looks beneficial for many users and becomes popular, we’re willing to expand to other levels as well!
Thank you for all of your support in joining the community, giving us feedback, and helping us improve the site for all users. We hope this new feature can help you in your learning journey! 
