This webpage has alternate versions available in Japanese via the use of the hreflang tag.
https://support.google.com/webmasters/answer/189077?hl=en
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Get access to data on 550,876 websites Japanese HREF LANG Customers. We know of 274,306 live websites using Japanese HREF LANG and an additional 276,570 sites that used Japanese HREF LANG historically and 121,424 websites in the United States.
Get a list of 550,876 websites using Japanese HREF LANG which includes location information, hosting data, contact details, 274,306 currently live websites and an additional 795,536 domains that redirect to sites in this list. 276,570 sites that used this technology previouslyand 121,424 websites in the United States currently using Japanese HREF LANG.
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