TateGaki adds vertical writing (tategaki) to Google Docs™ — a feature not natively available.
Write directly in a vertical editor within Google Docs™, using traditional Japanese genkō yōshi (manuscript paper) formats. Whether you're writing novels, essays, or any Japanese text, TateGaki provides an authentic vertical writing experience.
Key Features:
400-character (20×20) and 200-character (10×20) genkō yōshi manuscript paper
Plain vertical/horizontal writing modes
Ruby (furigana) text input
Japanese line-break rules (kinsoku shori)
Real-time character count
Undo/Redo (Ctrl+Z/Y, up to 100 steps)
Copy & paste support (Ctrl+V)
Grid lines ON/OFF toggle
Font selection: Mincho (Noto Serif JP) / Gothic
Export to Google Docs™ table (preserves manuscript paper layout)
Save/Load to Google Drive™ (auto-saved to "TateGaki" folder)
Print preview (canvas to PNG, browser PDF save)
How to Use:
Install TateGaki from Google Workspace Marketplace™
Open a Google Docs™ document
Go to Extensions → TateGaki → Open Vertical Editor
Start writing vertically!
Supported Environments:
Google Chrome™ (recommended), Microsoft Edge
Windows / macOS / ChromeOS
Privacy & Data:
TateGaki only accesses files it creates in your Google Drive™ ("TateGaki" folder). It does not access, read, or modify any other files in your Drive. No user data is collected, stored, or shared with third parties.

Google Docs™, Google Drive™, Google Workspace Marketplace™, and Google Chrome™ are trademarks of Google LLC.

■ About TateGaki Pro (paid plan)
TateGaki is free to use. In addition to the free features (400/200-character manuscript grids, plain vertical writing, ruby text, kinsoku line-breaking, table export to Google Docs™, saving to Google Drive™, print preview, and more), we offer a paid plan, "TateGaki Pro," which unlocks additional features such as custom layouts matched to book trim sizes.

- Price: 500 JPY / month (incl. tax)
- Renewal: Auto-renews monthly until canceled
- Cancellation: Log in to the customer portal below with your registered email address:
  https://billing.stripe.com/p/login/cNiaEQdnt40L29P9RFdAk00
- After cancellation: No further charges; Pro features remain available until the end of the current billing period
- Refunds: No prorated refunds

■ Payments (Stripe)
Payments for TateGaki Pro are processed through Stripe, Inc. ("Stripe"), a third-party payment processor. To confirm your Pro subscription and process billing, your Google account email address is sent to Stripe. Card details are collected and managed directly by Stripe; the developer does not store card information. Text and documents you create in TateGaki are never sent to Stripe or any other external server.

See our Terms of Service and Privacy Policy for details.