もじへん！
A browser-based tool for cleaning up Japanese text, separators, and normalization based on rules you define.
Products
A compact selection of the tools and plugins currently published on happas. View all products
Vanilla Form
Shape a Google Form to look and feel like it belongs on your site without the infrastructure headaches.
SproutSVG
A small browser app for turning images into SVG locally, with live preview and direct export in the same flow.
Slug-Free Permalinks
A WordPress plugin that switches URLs to stable ID-based permalinks, reducing maintenance and broken links.
Marklane
A WordPress plugin for fast Markdown publishing, with image resolution and multilingual post linking.
Blog
Notes on making things, trial and error, and what I am thinking about. The blog itself is managed in WordPress. View all posts
How to Handle Foreign Currency Transactions After Cancelling Platinum Preferred? Recommended Card Comparison to Beat Overseas Fee Increases
What should you use for foreign currency payments after cancelling the Sumitomo Mitsui Card Platinum Preferred, which only cost 0.63% in real fees? I compared the latest fees and reward rates of 8 cards on hand to find the best alternative.
Personal Notes on Windows 11 Development Environment Setup, Optimization, and Software Installation
A personal guide to setting up a new Windows 11 PC for development, including disabling unnecessary features, creating a Dev Drive, centralizing package manager caches, and installing favorite tools.
Cost-Effectiveness of Coding Agents and How to Leverage Cursor's Auto Mode (June 2026 Edition)
Based on primary sources as of June 2026, we compare API prices for major models from OpenAI, Anthropic, and Google, and outline how to position Cursor Auto for a sustainable development workflow.
Looking Back at My Credit Card History — How My Approach to Cashless Payments Evolved
From Orico Card to EPOS Gold, Rakuten Card, Platinum Preferred, Olive, and finally SBI Debit Point+. Tracing my main card history reveals a shift from chasing the best rewards to prioritizing simplicity.
Giving up Platinum Preferred: Why I’m Switching to SBI Debit Point+ as My Main Card
Since 2023, my primary card has been the Sumitomo Mitsui Card Platinum Preferred. Especially back when SBI Securities offered an astonishing 5.0% point return on credit card fund accumulation, it felt like the absolute best, single choice. Despite the steep annual fee of 33,000 yen (tax included), concentrating my daily payments onto this card yielded […]
WordPress 7.0 "Armstrong" Released: AI Core Integration, Dev Evolution, and the Deep Story Behind the Major Delay
WordPress 7.0 "Armstrong" was officially released on May 20, 2026. This article explores the full picture of this major update—including the AI Foundations core integration and dashboard modernization—and analyzes the background of the significant release delay from a balanced perspective.