Kirarity

Kirarity Custom Shipping

A Shopify app that brings shipping rates optimized for Japan to your checkout. Set rates per prefecture, and for about 200 inhabited remote islands with no postal codes required, on every Shopify plan.

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E-commerce site development and improvement

From building e-commerce sites, mainly with Shopify, to ongoing improvements and operational support — I can handle just about anything, including advanced customizations such as custom apps beyond theme work.

Shopify app development

I develop Shopify apps as my own original products. On July 13, 2026, I released Kirarity Custom Shipping, a Shopify app for customizing shipping rates, optimized for Japan and its many remote islands.

Kirarity Custom Shipping | Shopify App Store (opens in a new tab)

AI adoption and utilization support

Broad support for putting AI to work — from introducing AI coding tools such as Claude Code to embedding AI features into e-commerce sites and websites. I also build RAG-powered AI agents and automate routine tasks, such as Shopify marketing reports, with Claude and Google Apps Script.

Websites and owned media

Building, improving, and operating websites on a modern stack combining Sanity as a headless CMS with Astro and Cloudflare — I can handle just about anything. This site itself is built the same way.