25 years in kitchens. Bankrupt at 40. Now shipping dev tools. Don't trust your AI agent. Measure it. Building StereoBinary. https://xitter.cf/t.co/6w8zi2iTT9
Osaka, Japan
Joined March 2026
- Tweets3.5K
- Following472
- Followers580
- Likes4.9K
Pinned Tweet
I’m Yuma, an indie developer in Osaka.
After 25 years in kitchens and going bankrupt at 40, I’m starting over by building software.
Fellow developers and makers, let’s connect 🤝
I’m building developer tools and AI agent systems under StereoBinary.
Here, I share my projects, experiments, and lessons from building software, including the things that don’t go as planned.
I’m here to share what I learn, exchange ideas, and learn from your experiences, too.
🤖 Made with AI
Yuma Kakuya retweeted
Day 15/ We're cooked
Here’s what we’re cooking with Codex:
xitter.cf/i/broadcasts/1RKZzBELB…
I’m backing FULL RESET on Day 15 of TiboShips. 5.9 crowd odds.
Shipmate: @null_founder
No money. No prizes. Just dangerously confident software people.
Unofficial fan-made project. #TiboShips tiboships.com
Morning from rainy Osaka! What’s everyone making today? I’m on X with coffee in hand, as usual. Rain means my walking time is X time too 😂
Compared with using a single template, creating something block by block—like assembling a model kit—is more difficult. It’s quite a hurdle.
Yuma Kakuya retweeted
Good Morning Tech Twitter! 🌤️
This Sunday I am donating my time
and my Good Morning Post to an
incredible founder....
@AfterimageDev
So you're a Trader?
ETFs, Crypto, Stocks, Futures, Markets.
You know better than anyone else...
A split second advantage earns
you thousands of dollars.
Scootch is YOUR advantage.
Increase your profit line.
Try it today for free! 🔥🚀
Imagination fills the city. So much I want to try, so hard to choose. This time, I’d like to go with a simple, Japanese-style design.
Yuma Kakuya retweeted
OpenAI took so long to release a new model that DeepSeek went ahead and released a GPT for them.
Yuma Kakuya retweeted
If you have a startup, you need marketing, the cheapest marketing you’ll get is just organic posting on social media, but you can’t waste time individually posting on all 16+ networks, so you need to use PlatPost and post once to all at the same time and save 20hrs+ a week. Link in comments, it’s free to start, link in comments: ⬇️
Good morning, everyone, from Japan on a Sunday! Starting this week, the plan is to step away from Build and spend time exploring the city, looking for design inspiration for a friend’s restaurant. This week is a break for Codex and Claude, too.
Good morning, everyone! ☕️
It's 6 AM here in Japan, and I'm scrolling through X with a coffee in hand.
I'm back to building apps, but I've been hitting quite a few roadblocks.
I'm working with Astra and Opus 5.5, but I'm starting to think my brain just can't keep up with these two 😂
Yuma Kakuya retweeted
Sat on 968 followers right now, exactly 32 away from 1,000.
I set a goal to hit 1k last Sunday so I am running a bit behind schedule, but I reckon we can get it done today.
Any indie hackers and builders fancy connecting?
Who is pushing me over the line?
Yuma Kakuya retweeted
Share this FAR and WIDE.
Thats awesome Tibo, and for anyone who isnt making $1000 per month and is equally as serious if not more, you can join my builders community at platpost.com/circle everyone is welcome, its free, and has plenty of resources in the newsletter.
Yuma Kakuya retweeted
Thats awesome Tibo, and for anyone who isnt making $1000 per month and is equally as serious if not more, you can join my builders community at platpost.com/circle everyone is welcome, its free, and has plenty of resources in the newsletter.
I’m backing FULL RESET on Day 12 of TiboShips. 8.0 crowd odds.
Shipmate: @null_founder
No money. No prizes. Just dangerously confident software people.
Unofficial fan-made project. #TiboShips tiboships.com
Is OpenAI trying to beat Anthropic, or just catch up?
I still can't tell. Either way, I really hope they deliver something exceptional.
Astra 6.1 seems to be just around the corner, but will it actually outperform Opus 5.5?
The truth is, nobody knows yet.
I’m backing A SMARTER THING on Day 10 of TiboShips. 6.6 crowd odds.
Shipmate: @null_founder
No money. No prizes. Just dangerously confident software people.
Unofficial fan-made project. #TiboShips tiboships.com
I’m backing MORE OF A THING on Day 9 of TiboShips. 7.0 crowd odds.
Shipmate: @null_founder
No money. No prizes. Just dangerously confident software people.
Unofficial fan-made project. #TiboShips tiboships.com
Yuma Kakuya retweeted
I’ve achieved all my dreams.
Now my life’s a beach.🏝️
Builders, founders, Indie Hackers
and everyone embracing tech on X!
Your's can be too.🔥
Connect with me and together
we'll achieve YOUR dreams.🚀
At the start it's all about 'rewards'.
Every morning before I post here on X
I take a swim in the lagoon out
in front of my house.
But not just to 'keep fit'.
I go with a goal.
An objective.
A reward.
Find and collect beautiful shells.🐚
Because you can go further and
achieve more if you set yourself
goals that are rewarding.
It’s the dopamine hit.🤯
So connect with me today.🤝
And for every new connection that asks below?
I will reply with a photo of your own shell.
Your own instant dopamine hit.💉
Who wants to start living their dream today?