柏崎剛 (Tsuyoshi Kashiwazaki)

WordPress plugin that generates llms.txt and llms-full.txt files for AI/LLM accessibility and SEO optimization

Kashiwazaki GitHub Repository Display is a powerful and easy-to-use WordPress plugin that allows you to showcase your GitHub repositories on your WordPress website with beautiful, responsive cards.

WordPress plugin that analyzes post heading structure and provides SEO optimization warnings and suggestions. Includes automatic table of contents generation.

WordPress access log plugin with visitor tracking, bot filtering, CSV export/import, charts, and security features.

A plugin that generates an HTML sitemap from the navigation menu. Use the shortcode [menu_sitemap] to display the menu structure hierarchically.

An SEO plugin that automatically generates structured data (JSON-LD) based on content type. It supports the Article, NewsArticle, BlogPosting, and WebPage schemas, and outputs comprehensive structured data that also includes breadcrumbs.

A WordPress SEO plugin that automatically displays published and last updated dates for posts and pages. Features include responsive design with horizontal layout, shortcode support, PHP functions for theme integration, non-conflicting DigitalDocument…

A plugin that provides detailed media library management and author reassignment functionality for WordPress.

Kashiwazaki SEO Link Weaver is a WordPress plugin that allows you to easily create JavaScript-driven links, unlike standard HTML links. It enables you to finely control both the behavior and appearance of…

Automatically converts your navigation menu to a hamburger icon at custom viewport widths for responsive design.

A plugin that manages code snippets and allows you to call them with shortcodes. Supports PHP, HTML, CSS, and JavaScript, and features an editor with syntax highlighting.

natural-looking marker effect using CSS gradient that highlights the bottom half of text. Choose from 6 colors: yellow, pink, green, blue, orange, and purple.

A plugin to manage old slugs, allowing you to edit, delete, and disable redirects for them from the WordPress admin panel.

Kashiwazaki Shortcode Collector is a powerful WordPress plugin that lets you beautifully showcase posts, pages, and custom post types. With its intuitive interface, it’s easy to use for everyone—from beginners to advanced…

Kashiwazaki SEO Link Doctor scans all internal and external links on your WordPress site, identifies broken links and errors using lightweight HEAD requests, and provides an interactive preview to locate problematic links…

A simple and user-friendly FAQ block plugin with FAQPage structured data support. Create FAQs in posts, pages, and custom post types.

Adds a copy-to-clipboard button to WordPress Gutenberg code blocks. Features automatic programming language detection with labels and copy tracking analytics for SEO optimization.

Take control of your site's canonical URLs to prevent duplicate content issues. Supports all post types with pagination handling, HTTPS/www normalization, and conflict prevention with other plugins.

This plugin allows you to display a link in a card format by simply using a shortcode. It fetches the OGP (Open Graph Protocol) data from the specified URL and displays the…

A WordPress plugin that manages recommended rankings in one place, shows them above or below content or via shortcode, and outputs matching JSON-LD structured data.

A simple WordPress plugin that displays all posts and pages in a detailed list view. Shows title, post type, status, publish date, modified date, slug, and ID with sorting and filtering options.

A lightweight WordPress plugin that removes unnecessary HTML comments and blank lines from public page output, while preserving pre, textarea, script, and style content. Settings allow toggling comment removal, blank-line removal, and…

A WordPress plugin that shows banners and popups at the moment visitors are about to leave, with page targeting, frequency limits, A/B testing and stats.

Click heatmap analytics plugin for WordPress posts, pages, and custom post types.

Kashiwazaki SEO OGP Manager is a feature-rich plugin that makes it easy to manage OGP (Open Graph Protocol) and Twitter Cards for WordPress sites.

A WordPress plugin that automatically generates SEO-optimized landing pages for academic research preprints (papers prior to peer review).

Lock the last modified date (post_modified) of WordPress posts and intentionally control the update date for SEO optimization.

Displays a custom error page on HTTP 404 errors, featuring redirect suggestions, related articles, and recent posts. Includes color theme selection, structured markup, footer functionality, and customizable redirect behavior.

A WordPress SEO plugin that automatically converts tag names in post content into internal links to tag archive pages. Features per-tag link frequency control, minimum tag length filtering, tag exclusion lists, custom…

Kashiwazaki SEO Blocks is a WordPress plugin that helps you create SEO-friendly content with ease. Featuring multiple beautifully designed and highly customizable blocks, it provides powerful support for building professional websites.

Automatically generate SEO-optimized meta descriptions for WordPress posts and pages using OpenAI GPT.

WordPress plugin for SEO author schema display with social links and JSON-LD generation

An SEO-optimized plugin that generates XML sitemaps by post type and supports news, image, and video sitemaps.

WordPress plugin for step-by-step guides. Add steps via the block editor or the [ks_stepflow] shortcode, choose from 6 designs (timeline, card, big number, arrow, horizontal, minimal), and auto-generate HowTo structured data from…

WordPress plugin for site migration via meta refresh redirects. Redirects all frontend pages to a target domain with remote URL checking, title fetching, canonical tag output, and a customizable landing page. Includes…

Professional WordPress related posts plugin powered by OpenAI GPT and advanced similarity calculations. Features 3-tier settings system, detailed API statistics, and optimized performance for large-scale sites.

Lightweight Core Web Vitals optimizer — predictive prefetch, Speculation Rules, image optimization, Smart UX spinner, and a real-user measurement dashboard. No external dependencies.

WordPress AI chatbot that indexes your site (sitemap/llms.txt), semantically matches visitor questions to your pages, and answers with source links — provider-agnostic, cost-capped, privacy-aware.

Kashiwazaki SEO Custom Post Types is a WordPress plugin that makes it easy to add custom post types to your site. Even without coding knowledge, you can create and manage custom post…

Batch check the health of multiple XML files (such as sitemaps and RSS feeds). Automate monitoring with scheduled runs and email notifications to keep essential SEO-related XML files under control.

Kashiwazaki SEO Dynamic Date is a plugin that allows you to easily insert dynamic dates into your WordPress site content. By using the [ksdate] shortcode, you can display automatically updated dates and…

A lightweight WordPress plugin that combines an elegant Lightbox image viewer with comprehensive image SEO diagnostics. Analyzes alt attributes, filenames, dimensions, file sizes, and next-gen format (WebP/AVIF) support to calculate an overall…

Author control panel that monitors Kashiwazaki's wp- plugins/themes for updates via a single manifest — no token required. Dashboard + email alerts, security flagging, and self-update.

Advanced data collection plugin with Google Dataset Search optimization. Automatically generates voting and survey data in 5 formats (CSV/XML/YAML/JSON/SVG), maximizing SEO impact through complete structured data.

WordPress shortcode plugin that embeds responsive YouTube channel, playlist, or @handle video lists with [ks_tubelist]. Four display modes (grid, paginate, load-more, carousel), YouTube Data API v3 with transient caching, JSON-LD VideoObject schema…

A WordPress plugin that builds E-E-A-T-focused profile pages with complete schema.org ProfilePage/Person structured data (JSON-LD).

Automatically extract SEO-friendly keywords from WordPress posts and pages using OpenAI GPT.

Advanced SEO breadcrumbs plugin with URL status checking to avoid 404 errors and automatic hierarchy generation from URL structure.

WordPress plugin implementing the "LLM-native subdomain" pattern by Tsuyoshi Kashiwazaki. Serves a Markdown parallel version of your site on a dedicated subdomain (e.g. md.example.com) for AI crawlers (ChatGPT/Claude/Perplexity/Gemini) with inline Schema.org notation.…

Manages an independent author database with Person, Corporation, and Organization entities. Outputs author panels via Gutenberg block with Schema.org JSON-LD structured data. Supports standalone and custom modes that link to existing Article/NewsArticle/WebPage…