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NPC Slug Genius is built for Japanese WordPress sites that want clean, SEO-friendly English URL slugs without the manual translation work.
Most “slug translator” plugins translate Japanese to English literally. That gives you slugs like <code>recruitment-information</code> (from 採用情報) or <code>company-introduction</code> (from 会社案内), which are technically correct but unnatural for English-speaking search engines.
NPC Slug Genius takes a different approach: it uses AI to think about how an English-speaking searcher would actually look for the page, and generates slugs like <code>careers</code> and <code>about-us</code>. For Japanese-specific concepts that have no clean English equivalent (補助金 program names, etc.), it keeps the Romaji and translates only the surrounding words, producing slugs like <code>apply-monozukuri-subsidy</code>.
Key features:
<ul>
<li>Automatic SEO-optimized English slug generation on post save</li>
<li>Manual slug edits are respected and never overwritten</li>
<li>Safe by default for existing sites: posts created before plugin activation are skipped, so existing URLs are never rewritten unless you explicitly opt in</li>
<li>Configurable target post types</li>
<li>Safe fallback: if the API key is missing or the API call fails, the post saves normally with no error</li>
<li>BYOK (Bring Your Own Key): you control the API usage and cost</li>
</ul>
Supported AI providers (choose any one):
<ul>
<li>Anthropic Claude (Haiku model)</li>
<li>OpenAI ChatGPT (GPT-4o mini model)</li>
<li>Google Gemini (2.0 Flash model)</li>
</ul>
You only need an API key from one provider. Switch between providers anytime from the settings page.
Getting started:
<ol>
<li>Install and activate the plugin.</li>
<li>Go to Settings > NPC Slug Genius.</li>
<li>Choose your preferred AI provider from the dropdown.</li>
<li>Get an API key from the provider’s console and paste it in:
<ul>
<li>Anthropic: <a href="https://console.anthropic.com/settings/keys" rel="nofollow ugc">console.anthropic.com</a></li>
<li>OpenAI: <a href="https://platform.openai.com/api-keys" rel="nofollow ugc">platform.openai.com</a></li>
<li>Google: <a href="https://aistudio.google.com/apikey" rel="nofollow ugc">aistudio.google.com</a></li>
</ul>
</li>
<li>Choose which post types should get automatic slug generation (default: posts and pages).</li>
<li>Create a post with a Japanese title – the slug will be automatically generated when you save.</li>
</ol>
<h3>External services</h3>
This plugin connects to one of three AI provider APIs (whichever the user selects in the settings) to generate SEO-optimized English URL slugs from Japanese post titles. Only the provider you actively select is contacted; the other two are not used.
What the services are and what they are used for: 
These are large language model APIs used to translate Japanese post titles into natural English URL slugs. The plugin uses a low-cost lightweight model from whichever provider you select.
What data is sent and when: 
The plugin sends the post title (text only) to the selected provider’s API. The request is made only when a post is saved AND a valid API key for the active provider is configured in the plugin settings. No post content, user data, IP address, or site metadata is sent by this plugin. If no API key is configured for the active provider, no request is made.
<h4>Anthropic Claude (provided by Anthropic, PBC)</h4>
<ul>
<li>Endpoint: https://api.anthropic.com/v1/messages</li>
<li>Anthropic Consumer Terms of Service: https://www.anthropic.com/legal/consumer-terms</li>
<li>Anthropic Commercial Terms of Service: https://www.anthropic.com/legal/commercial-terms</li>
<li>Anthropic Usage Policy: https://www.anthropic.com/legal/aup</li>
<li>Anthropic Privacy Policy: https://www.anthropic.com/legal/privacy</li>
</ul>
<h4>OpenAI ChatGPT (provided by OpenAI, L.L.C.)</h4>
<ul>
<li>Endpoint: https://api.openai.com/v1/chat/completions</li>
<li>OpenAI Terms of Use: https://openai.com/policies/row-terms-of-use/</li>
<li>OpenAI Usage Policies: https://openai.com/policies/usage-policies/</li>
<li>OpenAI Privacy Policy: https://openai.com/policies/row-privacy-policy/</li>
</ul>
<h4>Google Gemini (provided by Google LLC)</h4>
<ul>
<li>Endpoint: https://generativelanguage.googleapis.com/v1beta/models/gemini-2.0-flash:generateContent</li>
<li>Google APIs Terms of Service: https://developers.google.com/terms</li>
<li>Gemini API Additional Terms of Service: https://ai.google.dev/gemini-api/terms</li>
<li>Google Privacy Policy: https://policies.google.com/privacy</li>
</ul>
By obtaining an API key from your chosen provider and using this plugin, you agree to that provider’s terms.
<h3>Privacy Policy</h3>
When a post is saved, this plugin sends the post title to the AI provider you configured (Anthropic Claude, OpenAI ChatGPT, or Google Gemini). The post title is processed to generate an English slug and is not stored by this plugin beyond the resulting slug.
No personally identifiable information is collected or transmitted by this plugin.

NPC Slug Genius

Automatically generates SEO-optimized English URL slugs from Japanese post titles using AI. BYOK (Bring Your Own Key).

Kazuto Takeshita

shohei.tanaka

Artisan-Workshop

Soft Steps EC

Japanized for WooCommerce is the essential toolkit for running a WooCommerce store in Japan. This plugin bridges the gap between WooCommerce’s global features and Japan’s unique e-commerce requirements.
Why You Need This Plugin
Running an online store in Japan requires specific features that standard WooCommerce doesn’t provide out of the box: 
* Japanese address formats with proper field ordering (postal code, prefecture, city, address lines) 
* Name reading fields (Yomigana/Furigana) for accurate customer identification 
* Delivery date and time selection that customers expect 
* Popular Japanese payment methods like bank transfer and COD 
* Legal compliance with Japan’s Specified Commercial Transaction Act (特定商取引法)
Who Should Use This
This plugin is designed for: 
* Japanese e-commerce businesses using WooCommerce 
* International stores shipping to Japanese customers 
* Anyone who needs Japanese address handling and payment methods 
* Stores requiring delivery date/time selection functionality
Seamless Integration
Works smoothly with WooCommerce core features and popular extensions. Fully compatible with the new WooCommerce Blocks checkout experience. All features are optional – enable only what you need for your store.
<h4>Key Features</h4>
Address & Name Management 
* Name reading (Yomigana/Furigana) input fields for billing and shipping addresses 
* Honorific title (様/sama) automatically added after customer names 
* Japanese-style address format with proper field ordering 
* Auto-fill address from postal code using Yahoo! API integration 
* Company name field support
Shipping & Delivery 
* Delivery date and time selection at checkout 
* Delivery time slot management 
* Holiday and non-delivery day settings 
* Weekend and specific date exclusions 
* Delivery-related fields hidden when free shipping is applied
Payment Methods 
* Bank Transfer (Japanese banks) 
* Japan Post Bank Transfer 
* Cash on Delivery (COD) with fee calculation 
* COD subscription support 
* Pay at Store (over-the-counter payment) 
* Paidy (Buy Now, Pay Later) – Official Japanese payment gateway
Legal & Compliance 
* Specified Commercial Transaction Act (特定商取引法) page creator 
* Shortcode support for legal information display 
* Customizable legal notice templates
Additional Features 
* Email template optimization for Japanese format 
* Address validation for Japanese postal codes 
* Affiliate integration (A8.net, Access Trade, Value Commerce) 
* WooCommerce Blocks compatibility 
* Security scanning and malware detection
Note: Paidy Checkout are also available as standalone payment plugins.
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Japanized for WooCommerce

Essential Japanese localization toolkit for WooCommerce - adds address formats, payment methods, delivery scheduling, and legal compliance.

NPC Slug Genius vs Japanized for WooCommerce