Mihata

spreadsheets — hit the wallyet?

Keep using the spreadsheet you already have.
We turn it into a beautiful, AI-ready internal admin app — built just for your team.

Get a free consultationSee real admin app samples
The admin app
The original spreadsheet

Sound familiar with Excel / Google Sheets?

lp.spreadsheetApp.painPoints.sub

That spreadsheet, now like this.

Beautiful, easy to use — and the data stays in your spreadsheet.

BeforeThe original spreadsheet
The original spreadsheet

Data sprawls across columns; hard to grasp at a glance.

AfterBoardBy phase / status
BoardListTimelineSummaryTo DoActivity

Board overview, click to edit details — data still in the spreadsheet.

Why use your spreadsheet
as the database?

The most expensive parts of building a custom app are database design and security/auth. By leaning on Google Sheets + Workspace, we dramatically cut development cost without sacrificing safety.

Keep your current sheet — no migration

Your existing spreadsheet becomes the database as-is. No need to break or rebuild your current workflow.

Skip the most expensive layer

Database design and server operations — the biggest cost centers — are handled by Google's infrastructure, slashing development cost.

Rent your security from Workspace

Password management, role changes, and offboarding are all handled by your existing Workspace. If they can open the sheet, they can use the app — no new accounts needed.

AI × Spreadsheet

Endless possibilities with AI

Because the data lives in a spreadsheet, AI integration is wonderfully flexible.

Live demo: Auto-fill from meeting notes

Paste a Google Doc / Meet AI meeting-notes URL — AI extracts customer info, project details, and next actions, then fills the form for you.

STEP 1

Paste the meeting-notes URL

Drop in a Google Doc or Meet AI notes URL

Paste the meeting-notes URL
STEP 2

AI parsing…

10–30 seconds to extract content from the notes

AI parsing…
STEP 3

12 fields auto-filled

Customer, owner, phase, and next actions — all populated

12 fields auto-filled

Auto-fill from meeting notes

Read Google Meet or Zoom AI meeting notes and auto-populate needs, issues, and next actions.

AI-powered data analysis

AI extracts trends and improvement points from the accumulated data, and proposes next moves.

Auto-drafted next meeting materials

Use admin data to let AI draft the next agenda and proposal materials.

Future-ready: Gemini integration

When Gemini can edit spreadsheets directly, humans and AI will edit the same data side by side.

Great for business management like…

If you've made do with Excel / Sheets but the UI just won't scale — these get dramatically easier.

Customer management

Lead → won, in one screen.

Project management

Phase-based kanban overview.

Inventory

Thresholds & auto-aggregates.

Sales pipeline

Per-member, weekly reports.

Attendance / shifts

Sheet edit = app update.

Purchasing

Easy supplier / cost compare.

Adaptable to any other business management area. Feel free to reach out.

We aim for one thing:
designs that are easy for both humans and AI.

Today's tools are skewed one way or the other — either easy for humans but hard for AI to edit, or AI-friendly but hard for humans to use.

Take the old website builders. Humans found them intuitive, but from an AI's perspective today, they're a mess of unnecessary steps just to edit a page.

The future is human + AI coexistence. By placing the spreadsheet as the database, humans get a beautiful app and AI works directly with the sheet — both usable at the same time. That's the design we believe in.

OWNED BY YOU

Delivered is not the end.

Admin settings you can customize and evolve yourself.

When your business changes, the admin app should change with it. Add fields, edit options, tweak phases — big changes through the maintenance plan, day-to-day tweaks any time on your side.

Admin settings — field management

Add & edit fields

Add or rename any field shown on each record. Columns are auto-added to the sheet too.

Edit option masters

Add, reorder, or remove options for owners, sources, categories — any time.

Customize the phase setup

Tweak phase order, names, and colors to match how your business actually works.

Continuous improvement

Bigger features and operational consultation flow through the maintenance plan — the tool keeps up with your business.

Pricing

Like web production: pick your initial fee, pick your maintenance.

初期制作費(excluding tax)

おすすめ

Template / Semi-Custom

Customize from a template (e.g., CRM)

250k JPY~
  • Pick from existing templates (CRM, etc.)
  • Customized to your spreadsheet
  • Workspace permission-aware sharing
  • Basic AI integration included
  • Post-launch operation walkthrough
  • Maintenance plan compatible

Delivery: From 2 weeks

Discuss this plan

Fully Custom

For complex sheets / heavy requirements

500k JPY~
  • Fits your sheet structure exactly
  • Workflow-wide design after deep interviews
  • Custom AI integration / automation
  • Cross-sheet aggregation & analytics
  • External API integration (Slack, Notion, etc.)
  • Maintenance plan compatible

Delivery: Quoted per requirement

Discuss this plan

Monthly Maintenance(excluding tax)

Light

For basic fixes

9,800JPY/mo
  • 3 fix requests/month (within 5 business days)
  • Text & field-name fixes
  • Dedicated request form
  • Sheet structure support
  • Emergency response
  • Feature / column additions
  • Monthly operational consult

Standard

Ongoing extensions & AI integration

19,800JPY/mo
  • 5 fix requests/month (within 5 business days)
  • Text & field-name fixes
  • Dedicated request form
  • Sheet structure support
  • 1 emergency response / month
  • Small feature / column additions
  • Monthly operational consult & AI tuning

Maintain and extend any time

We accept post-launch fix requests, feature additions, and operational consultation through a dedicated form. Flexible with spreadsheet structure changes.

No-upfront-fee plan available

For solo founders and businesses under 5 years old, a no-upfront-fee plan combined with maintenance is available. Feel free to ask.

Frequently Asked Questions

Get a free
consultation

Whatever you want to manage, whatever pains your spreadsheet has,
whatever you want to do with AI — feel free to reach out.

Contact us