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Japanese editor workflowsSanity / Contentful / StoryblokJST timezone overlapCommerce-ready CMSi18n-first architecture

Your Tokyo CMS is Choking on Japanese Characters Again

If you're managing a bilingual content team in Tokyo, you've hit the moment where WordPress multisite stops scaling.

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5,000+
Sites shipped
Since 2012
GMT/PST → JST
Timezone coverage
London + LA studios
<2s LCP
Core Web Vitals
Lighthouse 95+ mobile
¥1.8M–¥30M
Project range
MVP to enterprise
What Breaks When Your Headless CMS Wasn't Built for Japanese -- And How We Fix It

Your editor hits publish and the preview page collapses -- a string-length assumption built for English just broke your Japanese headline layout. A headless CMS decouples your content layer from your front end, letting your Tokyo team control Japanese content while developers ship API-driven experiences across web, mobile, and LINE without touching the CMS. We build on Sanity, Contentful, and Storyblok with custom field types that handle IME composition, vertical writing modes, and CJK string lengths that routinely exceed Latin-character limits by 40%. Your editors work in Japanese daily, so your schema validation, preview environments, and approval workflows should feel native -- not like a bolted-on localization. We don't have a Tokyo office. Our LA studio overlaps JST mornings for live syncs, and we deliver through structured async handoffs with bilingual documentation. The process works because headless projects are architecture-heavy and API-first, which suits remote collaboration. If your content team is switching back to spreadsheets because the CMS fights them, you're losing publishing velocity every single day.

Your Current Site May Be a Liability

Common gaps we find in nearly every audit.

Japanese text breaks editor UIs designed for Latin scripts
Risk: Editors abandon the CMS and revert to spreadsheets or PDFs, killing content velocity
Monolithic CMS can't serve both Japanese web and LINE/app channels
Risk: Content gets duplicated across systems, creating drift and inconsistency
Commerce catalog content locked inside Shopify or EC-CUBE admin
Risk: Marketing can't run campaigns without developer tickets, slowing seasonal launches
i18n bolted on after launch instead of architected from day one
Risk: Retrofitting multilingual support costs 3-5x more and introduces structural tech debt
Page speed tanking under heavy imagery and web font loading for Japanese typefaces
Risk: Core Web Vitals fail, hurting organic rankings on Google Japan
No structured preview environment for Japanese content reviewers
Risk: Approval cycles stretch from hours to days because stakeholders can't see changes in context

What We Build

Purpose-built features for your industry.

Build custom field types that handle IME composition and vertical text without breaking validation

Your editors stop abandoning the CMS for spreadsheets -- field validation works with Japanese input instead of fighting it

Design locale-aware content models with Japanese as primary and clean fallback paths for English

Your content stays consistent across web, app, and LINE channels from a single source of truth instead of duplicating across systems

Connect your headless CMS to Shopify or EC-CUBE so marketing owns campaigns without dev tickets

Your marketing team launches seasonal campaigns without waiting on developer tickets to update product content locked in Shopify admin

Create visual preview environments where stakeholders review Japanese content in desktop, mobile, and LINE formats before publish

Your approval cycles compress from days to hours because reviewers see exactly how content renders in context before it goes live

Optimize Next.js or Astro front ends with subset Japanese fonts and image pipelines tuned for heavy CJK asset loads

Your Core Web Vitals stay green under Japanese typography and imagery loads that typically tank page speed on Latin-optimized stacks

Migrate structured content from WordPress, Movable Type, or custom PHP into clean, typed headless schemas

Your Japanese content reviewers get structured preview URLs that show real layout behaviour -- no more guessing if a headline will wrap or break

Working with Tokyo clients

Tokyo-specific delivery

Tokyo market context

Tokyo's tech ecosystem spans legacy enterprise systems and cutting-edge startups, particularly around Shibuya and Roppongi. Many Japanese B2B SaaS companies operate hybrid models--bilingual content management for domestic and international markets. Rakuten, Mercari, and Z Holdings have normalized headless architectures here, but mid-market companies still run monolithic WordPress or proprietary Japanese CMS platforms. Content needs are unique: Japanese and English content parity, complex taxonomy for product catalogs, and strict data residency requirements. AWS Tokyo (ap-northeast-1) provides low-latency infrastructure. Headless CMS adoption accelerated during COVID as ecommerce brands needed faster iteration cycles without developer bottlenecks.

How we work with Tokyo

We serve Tokyo clients remotely from our London HQ and Los Angeles studio, with JST coverage through our Sydney-based engineers. Typical workflow: kick-off calls at 9am JST (midnight GMT, which we accommodate), async updates via Slack and Linear during your business day, Loom walkthroughs for complex migrations. We've worked with Japanese ecommerce brands and B2B SaaS teams who need bilingual CMS setups. Most technical discussions happen in English; we integrate with your local dev teams using GitHub, Vercel, and standard APIs.

Recent Tokyo project

Aoyama Commerce Systems

B2B wholesale platform

Aoyama ran a legacy PHP monolith serving 200+ wholesale buyers across Japan and Southeast Asia. Content updates required developer deployment cycles, blocking their bilingual marketing team. We migrated them to Sanity CMS with a Next.js 14 frontend, Vercel hosting in Tokyo region, and custom content models for product specs, supplier profiles, and regional pricing. Built a bilingual editing UI with Japanese/English field parity and automated slug generation for SEO-friendly URLs in both languages.

Content team now publishes updates in under 10 minutes without engineering tickets. First Contentful Paint dropped from 2.8s to 0.9s on mobile. Their regional marketing manager handles both Japanese and English content independently, saving roughly 12 developer hours per week on CMS maintenance.

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Budget context for Tokyo projects

Tokyo mid-market B2B SaaS and ecommerce projects typically range ¥4,000,000–¥9,000,000 for headless CMS builds, depending on content model complexity and integration needs. Enterprise migrations with legacy data can reach ¥12,000,000+. We invoice in GBP/USD but quote in JPY for transparency. Budgets here reflect the value of bilingual capability and low-latency infrastructure--AWS Tokyo hosting, CDN edge caching, and content workflows that support both domestic and international teams. Most Tokyo clients have allocated dev budget but need faster content velocity without expanding headcount.

Our Development Process

From discovery to launch. Quality at every step.

01

Content & workflow audit

Week 1-2

We map your existing content types, editorial workflows, approval chains, and publishing channels. We identify what's Japanese-only vs. multilingual and where the current CMS is failing your editors.

02

Platform selection & schema design

Week 3-4

We recommend Sanity, Contentful, or Storyblok based on your editorial team size, developer resources, and integration needs. We design content models and field schemas with Japanese input requirements baked in.

03

CMS build & editor environment

Week 5-8

We build the CMS studio -- custom input components, preview panes, role-based permissions, and webhook integrations. Your editors test with real Japanese content throughout.

04

Front-end integration & performance

Week 9-11

API-driven front end goes live with CJK typography, optimized asset delivery, and Core Web Vitals targets. Commerce and third-party integrations are wired and tested.

05

Editor training & handoff

Week 12

Bilingual documentation (English + Japanese), recorded walkthroughs for your content team, and a 30-day support window post-launch. We stay available for async questions during JST hours.

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Frequently Asked Questions

We don't have a physical office in Tokyo. Our team operates from London and Los Angeles, with Sydney-based engineers providing JST timezone coverage. We've delivered multiple projects for Tokyo-based B2B SaaS and ecommerce clients through remote collaboration--Slack for daily comms, Linear for task tracking, and scheduled video calls at JST-friendly hours. Most technical discussions happen in English, and we integrate seamlessly with your local development teams.
Yes. We've built headless CMS setups for Tokyo clients needing content parity across Japanese and English markets. Typical approach: locale-specific content models in Sanity or Contentful, automated slug generation for both languages, and field-level translation workflows. We configure the CMS so your Japanese marketing team can manage both locales without touching code. If you need machine translation integration (DeepL API is common here), we can build that into the publishing pipeline.
8–14 weeks for mid-market projects. Discovery and content modeling: 2 weeks. Data migration and CMS setup: 3–4 weeks. Frontend build (Next.js or Astro): 3–5 weeks. QA and editor training: 1–2 weeks. Timeline depends on legacy data complexity and integration count. We work async-first to accommodate JST hours, so handoffs happen daily without blocking progress. Most Tokyo clients appreciate the faster iteration compared to local agencies still running waterfall processes.
We deploy to AWS ap-northeast-1 (Tokyo) or Vercel's Tokyo edge nodes by default for Japanese clients. Content assets live in S3 Tokyo buckets, and we configure CloudFront with Tokyo origin for sub-100ms latency. If you have data residency requirements (common for B2B platforms), we ensure all customer data and CMS content stays within Japanese infrastructure. Database (Supabase or Postgres) also runs in Tokyo region. We don't route production traffic through US/EU servers unless explicitly required.
Most Tokyo clients see 60–80% reduction in content publishing time and eliminate developer bottlenecks for marketing updates. Example: if your team currently waits 2–3 days for code deploys to update a product page, headless CMS brings that to under 10 minutes with preview environments. Performance gains are significant--Lighthouse scores typically jump 30–40 points, which improves SEO and mobile conversion. Budget recovery comes from reduced developer hours on content tasks, faster campaign launches, and lower hosting costs compared to WordPress managed hosting.
No. Our studios are in London (HQ) and Los Angeles. We've shipped headless CMS projects for Tokyo-based clients entirely through remote delivery. Our LA team's working hours overlap with JST mornings — typically 9:00-13:00 JST — which gives us a solid daily sync window. The rest runs async: structured Slack channels, Loom walkthroughs, and bilingual documentation. Headless CMS work is architecture- and API-heavy, which maps well to remote collaboration. We won't pretend we're local, but we will be responsive and structured.
Our LA studio operates on Pacific Time, which gives us a 9:00–13:00 JST overlap window every weekday. We schedule standups, review sessions, and stakeholder calls in that window. Outside of it, we use async updates — recorded demos, written briefs, and pull request reviews — so your team in Tokyo never waits a full day for a response. Our London team adds a second overlap window in your late afternoon if needed.
Yes, and this is a bigger deal than most agencies realize. Japanese input via IME behaves differently from Latin typing — composition events, character conversion, and string length all need specific handling. We build custom input components that respect IME composition, validate Japanese string lengths properly, and render preview text with correct CJK line-breaking rules. We've dealt with the gotchas: fields that break mid-composition, character counters that miscount multibyte strings, and preview panes that mangle vertical text. Your editors should feel like the CMS was built for Japanese, not adapted from an English template.
It depends on your team. Sanity gives you the most control — its customizable studio lets us build deeply Japanese-native editing experiences with custom input components and live preview. Contentful works well for larger teams that want a more structured, permission-heavy workflow out of the box. Storyblok is strong when visual editing and drag-and-drop layout matter more than schema flexibility. We'll recommend based on your editorial team's size, technical comfort, and integration needs — not our preferences.
Yes to both. WordPress migrations are straightforward — we extract via WP REST API or direct database export, transform into typed content models, and import into your headless CMS. Movable Type is more common in Japan and less standardized, so we typically write custom extraction scripts that parse MT's export format and map fields to your new schema. In both cases, we handle Japanese-specific issues like encoding normalization, image path rewrites, and preserving HTML content blocks that use CJK-specific markup.
Most projects land between ¥1.8M and ¥30M depending on scope. A single-language content site with a clean migration might be ¥1.8M–¥5M. A multilingual commerce-connected CMS with custom editor workflows, multiple publishing channels, and a performance-optimized front end runs ¥8M–¥30M. We scope in detail after a paid discovery phase, so you get a fixed quote before the build starts — no open-ended timesheets.
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