An Important Grammar Point When Talking about Japanese (Kanji ○ Kanjis ☓)

Whilst this is a post about English grammar, I thought it would be relevant and useful, as many people make this mistake when talking about Japanese, so I decided to post.

In English, the plural form of loan words is always the same as the singular form:

Do you know these **Kanji**? ○

Do you know these **Kanjis**? ☓

I like many different **Manga** by Tezuka Osamu. ○

I like many different **Mangas** by Tezuka Osamu. ☓