Two Brain
日本語

Two Brain

People and AI. Beyond what’s possible.

Think together. Choose for yourself. Make something real. A new relationship with AI, from Japan.

Explore .IAbout Two Brain

An independent project / Japan

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ABOUT TWO BRAIN

One idea.
More possibilities.

Two Brain (twobrain) explores how people and AI can think and create together. New perspectives, choices of our own, and ideas that become real.

An independent project by Hirayama Daiki. Not yet incorporated.

About Two Brain

Our first product

Invitation-only trial · AI and payments in preparation

From thinking to making.

Explore the .I website

01 / Friend / Brain

Take an idea one step further.

Friend for a conversation. Brain for a closer look from different perspectives. Find saved conversations and return to an idea as we develop the AI experience.

  1. Put it into words
  2. Explore perspectives
  3. Make your choice

Live AI responses and search are in preparation※2

.I overview
.IIllustrative example

Start with a small idea.

I want to make an app for places I'd like to visit.
Talk it through.

A place on your mind. A plan for the weekend. Start before your idea is fully formed.

This example does not send anything to an AI.

02 / Codef

Turn an idea into something to try.

Edit files, review changes, and preview your project in one workspace. Make something tangible, then refine it as you go.

  1. Edit your project
  2. Review the changes
  3. Preview your work

AI creation and cloud execution are in preparation※3

Explore Codef
CodefIllustrative example
index.html
<main>
  <h1>Little travel notes</h1>
  <p>Where shall we go next?</p>
</main>
Edit → Save → Preview
Preview example

Little travel notes

Where shall we go next?

A little seaside townA walk, a cup of tea, a moment to rest.

03 / .I Store

Find a home for what you make.

Prepare a Store draft from a saved Codef version, describe your work, and revisit acquired items in your history. Connect making with using.

  1. Save your work
  2. Submit the project
  3. Review for publication

Real-money sales and payments are in preparation※4

Explore .I Store
.I StoreIllustrative example

Little travel notes

Places to visit, one at a time.

Draft example
Project
Codef
Description
Prepare the details
Publishing & sales
Not yet available
.IIllustrative example

Start with a small idea.

I want to make an app for places I'd like to visit.
Talk it through.

A place on your mind. A plan for the weekend. Start before your idea is fully formed.

This example does not send anything to an AI.

.I TODAY

A place to pick up where you left off.

Set up your profile, find a saved conversation, and revisit acquired work. Explore the foundations of .I through invitation-only access.※1

Invitation onlyTry nowLog in

Start small. Make it yours.

Every idea has a beginning.

Talk it through

Before an idea is fully formed.

Start with a thought. Find your next step.

Find a direction

Make room for possibilities.

Bring your options into view.

Try making it

A little tool, all your own.

Edit, preview, and keep refining.

Make it tangible

Something to look forward to.

A place to save places. Start there.

Prepare to share

Someone else’s next discovery.

Prepare a description and a Store draft.

Illustrative ideas. Open a card to see the feature and its current availability.

LET’S TALK

Something on your mind?
Let’s talk.

About Two Brain, .I, or something you want to make. Tell us what you have in mind, or where you need a hand.

Contact Two BrainAsk about .I

One place for .I, Codef, and Store enquiries.

Availability and notes

  1. Registration requires a valid invitation and a passkey. The trial includes profiles, search and restoration of saved conversations, and Store history. Existing account holders can use Log in.

  2. Live Friend and Brain responses, web and X search, and AI-team collaboration are in preparation. Conversations and screens on this website are illustrative examples, not AI submissions or actual execution results.

  3. Codef supports saving, editing, reviewing changes, previewing, and preparing a Store draft from a saved version. Submission and review depend on account permissions. AI creation and automatic cloud execution are not connected.

  4. Store history supports search and loading more acquired items. Listing and acquisition depend on item status and account permissions. Real-money sales and payment processing are not enabled.

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