I01 / 03
Start with the problem
Technology is a tool, never the goal. We obsess over real problems and only ship when the answer is undeniably better.
A product studio · Tokyo
Make somethingpeople want.
Y7 Technology is a small studio engineering quietly extraordinary software — used daily by people we'll likely never meet.
Est. 2023Shibuya, Tokyo
Scroll
00Index
Manifesto
Software, when crafted with care, becomes invisible — and the lives around it become slightly better, every day.
We don't chase trends. We don't ship feature lists. We pick problems we genuinely care about and obsess over them until the shape of the solution feels inevitable.
Then we polish, and polish again — because the difference between forgettable and indispensable is hidden in the last twenty percent that almost everyone skips.
How we work
Three principles.
Practiced, not posted.
II02 / 03
Compress the loop
Speed compounds. We design, build, and learn in tight cycles — every release teaches us how to make the next one truer.
III03 / 03
Subtract relentlessly
Excellence isn't more features. We remove until what's left feels inevitable — fewer surfaces, sharper edges, deeper care.
Selected work · 2026
We build the things
we wish existed.
ProductiOS & Android · 2026
Fitlog
AI-powered fitness logging. Snap a meal — Fitlog handles the nutrition, the math, and the memory. So you can focus on the habit.
Live on iOS & Android
Read the case
ProductAd operations · SaaS
Loop Marketing
Truth-first ad operations for mobile apps. It measures, decides, generates creative and ships it — and refuses to act on a number it cannot stand behind.
Live · no sign-up to tryRead the product page
Why the expensive ones are expensive
Reach got more expensive. Swapping the creative will not fix this.
Not enough history to name a cause. Export a longer window.
ProductBible companion · iOS
Selah
Ask anything, rooted in Scripture. Verses are quoted verbatim and never written by the model — and where traditions differ, it shows the range instead of picking a side.
Live on the App StoreRead the product page
Scripture
Quoted verbatim, with the reference shown.
Reflection
Set apart, labelled, and never mistaken for the text.
ProductVoice readings · iOS
Tellune
Talk to a reader by voice, any time of night, with no waiting. Tarot, astrology, palm reading and more from twelve readers, in Japanese and English. No sign-up, and the first three minutes are free.
Live on the App StoreVisit tellune.ai
You
Is he still thinking about me?
Reader
Let's draw a card and look at what's between you now.
Get Tellune on the App StoreTellune in Japanese: 声で話せる占い・恋愛相談アプリ Tellune
Working on something?
Let's build
something great.
We're selective about what we work on, but always open to a conversation when the problem is real and the people are relentless.