Tomosto
JapanesePricingStart free
Japanese-first beta for web novel workflows

Plan, draft, and keep your serial fiction consistent.

Tomosto helps web novel authors turn a rough idea into a long-form project: plot, characters, foreshadowing, chapter drafts, revisions, synopses, and cover briefs in one workspace.

Before you try Tomosto

The app interface and generation flow are currently Japanese-first. Free signup does not require a credit card. Paid plans are billed in Japanese yen.

Start freeView plans
3free chapters
10+genre lanes
1serial workspace
Tomosto Studio
The Exiled Arcanist's Return
Tomosto
Long-form projectcover brief ready
Chapter 1: Banishment and the sealed grimoire
Foreshadowing: a lost core beneath the capital
Cover brief: dusk-lit magic city and a lone silhouette
An exiled mage rebuilds a forgotten workshop on the frontier, uncovers the capital's buried power source, and turns a place of rejection into a home worth defending.

WHY IT IS DIFFERENT

Not just a prompt box.

Tomosto is shaped around the actual workflow of serial fiction: planning, drafting, revising, and keeping the story's moving parts together.

Built for serials

Designed around multi-chapter projects, plot continuity, and chapter-by-chapter production.

Anime-inspired structure

Useful for light novel, isekai, progression fantasy, romantasy, and web fiction formats.

Writer-owned output

Use Tomosto as a production assistant while keeping your story direction and final choices yours.

From idea to publishable package in 4 steps

STEP 01

Shape the concept

Start from a genre, keywords, or a rough idea. Tomosto turns it into a usable long-form setup.

STEP 02

Plan the serial

Build characters, stakes, foreshadowing, chapter beats, and emotional arcs before drafting.

STEP 03

Draft chapter by chapter

Generate each chapter with context from the previous flow, not as disconnected one-off text.

STEP 04

Review and publish

Revise chapters, prepare summaries, and keep assets together in your project library.

OUTPUT SAMPLE

Story packages for web fiction platforms

Draft chapters, story summaries, cover directions, and project notes stay organized so you can move toward Royal Road, Wattpad, Tapas, Kindle, or your own site.

Isekai fantasy
The Exiled Arcanist's Return
Tomosto
Cover brief + title asset01
Romantasy
The Contract Princess of Dragoncourt
Tomosto
Cover brief + title asset02
Cozy fantasy
The Starfall Frontier Workshop
Tomosto
Cover brief + title asset03

Genre lanes for serial fiction

IsekaiRomantasyLitRPG-style progressionVillainess fictionDungeon fantasySchool romanceCozy fantasyMysterySlow lifeDark fantasy

Style presets for different voices

Fast web novel pacing
Light novel voice
Emotional drama
Clean commercial prose
Custom style profile

PLANS

Try the workflow before you scale it.

Prices are billed in Japanese yen. The free plan lets you test the first chapters before choosing a paid workflow. The app experience is currently Japanese-first.

Free

JPY 0

No credit card required

  • OKTry up to 3 story chapters
  • OKCreate 1 project
  • OKSave recent projects
Most practical start

Lite

JPY 980/mo

For testing a real serial workflow

  • OK15 chapter generations per month
  • OK5 projects per month
  • OK3 cover image generations per month
  • OKChapter revision and plot feedback

Standard

JPY 2,980/mo

For steady web novel production

  • OK100 chapter generations per month
  • OK10 projects per month
  • OK20 cover image generations per month
  • OKIdea-to-project setup and plot adjustment

Pro

JPY 7,980/mo

For high-volume creators

  • OK500 chapter generations per month
  • OK30 projects per month
  • OK100 image generations per month
  • OKAI story review, synopsis support, and custom style
See full pricing details

START NOW

Build the first version of your serial, then decide what to keep.

Start with 3 free chapters. No credit card is required for the free trial. The app is currently Japanese-first, so please test the workflow before choosing a paid plan.

Start free