Top Training & Certification Websites in Japan

Key Insights on Top Training & Certification Websites in Japan on December 2025

As of December 2025, ad-contents.jp leads Training & Certification in Japan with 3.42M monthly visits. Its audience skews mobile-first (8.76% desktop / 8.76% mobile), and traffic is down month over month -14.62% and up year over year 39.9%. lopia.jp holds second with 628.56K visits and a mobile-leaning mix (14.11% desktop / 85.89% mobile), while bestjuku.com ranks third with 568.77K visits.

Across the leaders, bellemall.jp is the most mobile-first (100% of visits), whereas temairazu.net is the most desktop-reliant (100%). Momentum favors personaldevelopmentschool.com in the latest month (16,092.53%), while shozemi.com shows the steepest pullback. On a yearly view, zeroforme.com posts the strongest expansion (1,510.88%), contrasted with kayagrv.com (-74.53%).

Acquisition patterns also differ: ad-contents.jp is driven primarily by search, ad-contents.jp by direct, and ad-contents.jp by referral; overall, 34 of the top 100 sites are direct-led, 63 are search-led, and 2 lean on social.

These insights come from the Traffic & Market Toolkit, enriched with extensive clickstream data.

Our AI algorithms analyze petabytes of information from a blend of proprietary and external data pools, reflecting the online activities of over 200 million anonymized users.

For more detailed information on our data-gathering and analysis process, please visit our information page here.