The Idol Who Can't Code Just Built an Entire Livestream System With AI

You should post this on Qiita too! (Qiita is a Japanese platform where engineers share technical write-ups)

Karin-chan is amazing.

Is she seriously the first idol in history to write a technical blog…?

Doing it all by herself is amazing! Actually it’s kind of insane (lol)

Never thought I’d see the day when a former Hello! Project member was out here talking about AI.

Wow! I can’t count how many times Miyamoto-san’s disciplined, almost monk-like dedication and logical way of talking has surprised me.

This is too funny, first time I’ve ever seen the word “CORS” show up in an idol’s blog.

As someone who’s been watching her from way back, seeing Miyamoto Karin handle Cloudflare like a pro and turn her official blog into a tech blog is genuinely nothing but hope — I can’t watch it without tearing up.

It’s funny that right when people are up in arms saying “don’t you dare use generative AI in a Juice=Juice music video,” former Juice=Juice super-ace Miyamoto Karin goes and builds her whole content pipeline with generative AI.

This is insane… Juice=Juice, which is having a huge moment right now, practically felt like it was built around Miyamoto Karin — a monk-like super-ace idol — and then she suddenly announced she was graduating to “do DIY and make things,” which sent fans into a stir. But now she’s literally building technology and making things happen for real, and that’s just cool.

Ohhh, I see — in the middle of this whole “feeding your MV into generative AI is bad” sentiment, she’s the one actually building the app that feeds her own MV into a generative AI (LLM). That’s hilarious.

This is genuinely impressive — and it’s not just “she generated some code with Claude Code” 🤯

In ten days she put together Cloudflare Workers + KV, an on-stream HUD for OBS, a phone-based admin dashboard, a system for pulling post counts from X, and even a local app that scores video with a Vision API.

Her planning ability and judgment calls are what’s actually incredible here.

Still haven’t fully read it, but the more I read into the details the more shocked I get.

Honestly it’s shocking enough that the word “API” is coming out of Karin-chan’s mouth at all — an API is basically the interface that lets a web service talk in requests and responses instead of going through a browser (that’s what my own YouTube search does too).

Wow… she’s genuinely, seriously talented…

I handed all the implementation over to Claude Code and never read a single line of the code myself, so I can’t really explain “why it’s written this way.” Still, what’s running where, why I chose to put things there, where I got stuck on the day — those are the calls I made myself, so I’m writing down what I can.

I’m an engineer myself! Even though the post barely uses any technical jargon, you can tell she genuinely understands what she built. It almost feels like she’s deliberately holding back the terminology because it’d be overkill here.

It’s also great that she had a clear requirement of her own — not wanting the stream to stop.

I think you can build pretty much anything, as long as it’s not handling other people’s money or data.

Honestly this feels like it could pass as a science-major graduation thesis 😂

Then again, that also means someone with zero technical knowledge can pull this off with AI, which got me curious about how universities handle graduation theses these days — turns out it’s a whole mess of “partial use allowed” rules and so on…

Though if you frame it as research about using generative AI, it’d probably fly.

Truth.

This is so insane my jaw actually came unhinged.

Knowledge is basically free now, and “attention to detail” is turning into the only thing that sets you apart —

guess that era has officially begun.

The story of an idol building an entire livestream system with AI.

“The Technical Architecture of the HANAKIN Livestream System.”

It’s amazing, I’d definitely recommend reading it.

Amazing, seriously amazing.

I feel this myself from using AI a lot — fundamentally it’s the strongest tool there is for amplifying whatever you already have.

In other words:

• If you’re already someone with something to offer, AI makes you unstoppable
• If you’re currently nobody in particular, using AI still leaves you nobody in particular

That’s basically the story here. It’s a cruel era.

Well, at this point anyone can build basically anything, so it’s going to come down to how well you can multiply an LLM against whatever you’re already good at, and supercharge that strength.

In other words, it’s not just about the LLM by itself — the value of actually being a domain expert goes way up too, and combining the two makes you even stronger.

Honestly, not having that expertise is going to be the rough part now.

It’s genuinely amazing that AI has made it possible for literally anyone to turn their ideas into something real. It made me realize that whether you can code matters less than being able to concretely think through what you want to build and how you want it to behave, and put that into words. Going from the initial concept, to figuring out what features you need, to prioritizing them, all the way to actually shipping something that got used live for a 10-hour stream — that’s what’s really impressive.

I even went and read the technical blog post! ✨ I was genuinely moved by the idea — and the follow-through — of turning AI into an ally precisely because she can’t code, and using that to pull off a 10-hour stream. Knowing what was happening behind the scenes only deepened my feelings for HANAKIN! Looking forward to whatever she takes on next 😊💜