Continuing from the last post The last post covered how far the idea of correcting cheap air sensors against reference stations has come over the past ten…

I got a consultation request from a certain party. Since it's a consultation, I can only describe it in the abstract, but roughly speaking, there's a category…

Quite a lot of Japanese people are probably shopping on Aliexpress and Taobao by now. Most of them have probably ended up with cheap junk at some point,…

An M5Paper board — an ESP32 board with a 4.7-inch e-paper display — had been sitting on my desk. What makes e-paper interesting is that it holds an image with…

Over the weekend, while keeping my kid occupied, I found myself looking at the M5Stack boards lying around. Given my line of work, boards like this pile up.…

Previously, I wrote about what came out of a WordPress installation left untouched for over 10 years. This time is a record of the recovery work itself. It's…

At the 2026 World Cup, Cape Verde caused a sensation. First appearance ever. Population 550,000. The second-least populous country to reach the World Cup,…

For a while now, I'd been watching a certain stock's order book every day. It was SpaceX (SPCX), which went public on June 12. IPO price $135, net proceeds…

I sometimes get asked, "Do you have RoHS certification?" Every time, I answer, "There's no such thing as RoHS certification." Most of the time, the air fills…

This long-running series has reached its final installment. Up to this point I've written about "where AI works and where it doesn't," following the process of…

A while back, a development partner asked me, "Just do these three things for me." npm, pip, bundler. The task was to switch each package-fetching setup to go…

The previous post covered the release work on KDP. There I mentioned lightly that "AI helped with the cover," but this cover cost me far more than "helped" can…

Last time I ended on a sour note, saying that "editing in Japanese turned out to only make things a little easier." This time I'll swing the pendulum back…

This is an honest installment. Up to now I've written with plenty of swagger about "making AI into a team and producing a full-length novel," but once I…

For a while now, I'd had a nagging sense that explanations of LLMs just don't land with students. Lining up terms like "large language model," "Transformer,"…

In Episode 1 of this series I wrote about the concept and the outline. This time, I want to talk about how I actually built this novel — using generative AI as…

This story may not be familiar to those who have never been involved in a product release, but it comes up often in the industry. Products differ so much in…

Amine-based solvents are widely used in current commercial-scale CCS (Carbon Capture and Storage) plants, and I had personally accepted this without particular…

I don't need to describe requirement specification templates myself, since various organizations and volunteers already provide all kinds of them. Using…

【Objection ①】 You should write a proper spec as early as possible. If you don't clearly define what you're building and why, right from the start, decisions…

This is a question I occasionally get, and the people who ask it are almost always people who don't build prototypes themselves. That's because the people who…

Actually, this is a strange question. PoC (Proof of Concept) is sometimes described as "proving a hypothesis," but I think it's a term most often used to…

Let's start by considering why development reviews don't get adopted. 1. They're a hassle, including schedule coordination 2. There's no suitable person to act…

Project managers (PMs) often draw Gantt charts. This is a chart where each task and its owner are listed in a row, and a bar extending horizontally shows where…

If I had to narrow it down to just one thing, it would be crisis management ability. The ability to detect potential crises, properly assess their probability…

I have worked at both companies with in-house fabs and fabless companies. In most cases startups drift toward fabless. That's because owning a factory carries…

Instinct, gut feeling, and boldness. That's what I'd like to say, but let me put down a somewhat more logical account as well. There is generally no technical…

It's rare for someone to ask that so directly to your face, though it does happen, but I sense strongly that this question is sitting in the back of many…

There are various opinions, at various levels, about the mechanics behind the cheapness of Chinese manufacturing, so what I present below is only the extent of…

It's true. Molds are the single biggest risk factor in manufacturing, squeezing both schedules and wallets. For example, making even a simple box, something as…

This is a very common question in consultations, and there really doesn't seem to be much good material out there that systematically explains the overall…

When releasing a product, one thing you always have to decide is the price. There's a rough rule of thumb often repeated: "You'll be fine if you set the price…

Contrary to what the name suggests, an instruction manual doesn't just need to explain how to use the product. I'll explain that point here. <The manual is…

Legal matters carry extremely high risk when things go wrong. So you absolutely need expert advice. That said, startups that have just launched mostly don't…

I once wrote a blog post on the topic "Which is more advantageous, software or hardware?" I'll skip the details of the argument, but here's the conclusion:…

Development never goes smoothly. Specs change mid-development, deadlines close in with no resolution in sight, tooling has to be remade, patent licensing…

The story of ditching plastic is basically the story of alternative materials. Polymers aren't my area of expertise. Honestly, it's a domain I don't fully…

DACC (Direct Air Carbon Capture) is a much-watched field, explicitly named in the IPCC's Sixth Assessment Report as "not an option — the target cannot be…

I once talked with someone from an advertising agency about an app and got the comment: "iOS-only is unthinkable, right off the bat. No way." For developers,…

In practice, this is a case-by-case matter. Let's consider a few typical examples. ＜The case of Company A＞ Company A is a startup that has just launched, and…

The classic risky-development situation In practice, this kind of situation is a classic in development work. Everyone goes through it with a heavy heart. You…

I think this is really true, from experience. That said, the distribution has a distinctive shape worth noting. Suppose, for example, that the variation in…

Whether you call it "winning" or "losing" depends on definition, but becoming like China again is, I think, simply no longer possible. The reason is the…

I'll write my answer to a question I often get asked at the end of talks and lectures. I think readers who follow my blog already understand how many…

I pulled the note account I'd been using for about a year and moved back to my own company blog. Here are the reasons why. Did traffic increase? The only real…

The following text was written for a different occasion, but since it contains content of high public value, I decided to extract it and publish it separately.…

The other day, the Journal of Information Processing Society of Japan ran a special feature on this topic. Around the same time, I found myself going through…

Zoom, which everyone uses. I keep hearing "isn't there all kinds of talk about security problems with it!?" and getting asked about it. So I'm writing this. By…

Getting a patent is a kind of "given" For people building business strategy and people launching startups, one of the things most of them worry about is…

I implemented UART communication between M5Stack and M5Stack. That works with really simple codes. This is sending something over UART. Gist This is receiving…

Show this code just posting something to Slack channel by pushing the button on M5Stack In loop() section, I'm using some magic numbers in order to clean up…

This post is a back number of a previous entry It was a while ago now, but the topic in the headline gave me the answer I'd been looking for. Thank you,…

From Astro Teller's SXSW talk at Google[x]. There was an interesting moment when he talked about a project to generate wind power by flying kites. Conventional…