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This category contains articles with Japanese-language text. The primary purpose of these categories is to facilitate manual or automated checking of text in other languages.

This category should only be added with the ((Lang)) family of templates, never explicitly.

For example ((Lang|ja|text in Japanese language here)), which wraps the text with <span lang="ja">. Also available is ((Lang-ja|text in Japanese language here)) which displays as Japanese: text in Japanese language here.