Good technical writing conveys not just knowledge, but perspective. This is where I think and write.
I came across a video from ten years ago of myself playing and singing in a rooftop shack apartment. It brought back the recording studio I paid for in high school, and the version of me who once considered going into music. If I had one piece of advice for my younger self, it would be: keep a record of your life.
In college, to learn Japanese, I looked for language-exchange partners on Lang-8 and JCInfo.net. It wasn't efficient, but it introduced me to two wonderful people: once over fugu hotpot in Osaka, once at a reunion in Taipei five years later. Getting together for no reason at all may only grow more precious in this era.
I once wrote a small tool to count how many PRs I had contributed in a quarter, how many reviews I had left, and how many tickets I had closed, hoping to use the numbers to prove my output to my manager. My manager simply said performance is not judged by output alone. Only years later did I understand—when measurement becomes the goal, it is no longer a good measure. From Britain’s window tax and the Hanoi rat bounty to evaluating developers by PR count today, the mechanism is exactly the same.
Putting an image on a web page is the easiest thing in frontend. But doing it properly — resizing, generating every format, holding up under traffic — turns into a whole solution of its own. I ended up handing all of it to Cloudflare Images and keeping just one original.
At the end of 2024, I left LINE Fukuoka (now LY Corporation). This post looks back at the things I worked on, the managers and colleagues I met, and why I eventually chose to leave.
Feynman, Chaplin, and the film *100 Meters*—from an insecure teenager to someone who can help others, this is a sharing of the thoughts and attitudes that have influenced me the most.
Why bother maintaining your own blog in this era of short-form video and social media? Here are my thoughts after writing a blog for nearly ten years.
Sharing my recent weight-training reflections
How do you make employees work overtime every day? How do you make them work as hard as a boss? Give them the same equity.
Based on an article by Jake Archibald, this post organizes how modern responsive images should be written: why `width`/`height` still matter, when to use CSS `aspect-ratio`, how to choose between AVIF and WebP, and how to use `picture`/`source`/`srcset` for switching images on mobile.
Just go code
An essay extending Wiwi’s “Default” — discussing the unwritten rules of Fukuoka escalators, how AI content takes over SEO rankings, and Voltaire’s definition of taste.
Many engineers end a discussion with “it depends.” But to me, what matters most is whether a discussion can actually move forward.
Making a textarea auto-resize used to require JavaScript to watch scrollHeight. CSS field-sizing: content replaces all of that in one line, supporting textarea, input, and select.
Being a cynical critic feels great and makes you feel superior, but in the end you’ll realize it leaves you with nothing but emptiness.
What scenarios are JWTs and session cookies each suited for? This article revisits the old debate from the perspectives of security, implementation cost, and user experience.
Many people use terms like startup, growth stage, and stable stage to describe companies, but these words are too vague to serve as useful criteria. What is this company surviving on right now? How does it grow? What is its most painful problem? If you understand company stage, you’ll know what problems you’re solving every day, and whether this company is actually a good fit for you.
From ChatGPT 3.5 to Claude Code, software development has undergone dramatic changes in less than three years. Observations, reflections, and confusion from a software engineer amid this transformation
Access Keys are an easily overlooked security risk on AWS. Use OIDC with IAM Roles so GitHub Actions can securely access AWS resources without any secrets.
Before choosing a cloud platform, calculate the real cost your team pays for AWS.
