Our detectives are back with the following intel on this WordPress site
The site is using the 賢威6.2 ヘルシー版 theme by 株式会社ウェブライダー .
We could identify 3 plugins (there might be more) - All in One SEO – Best WordPress SEO Plugin – Easily Improve SEO Rankings & Increase Traffic , Contact Form 7 and Jetpack – WP Security, Backup, Speed, & Growth
The original WordPress SEO plugin. Improve your WordPress SEO rankings and traffic with our comprehensive SEO tools and smart SEO optimizations.