Shinsei Studio is a web studio building lean, fast WordPress websites made to last

Custom websites that load fast, use less energy and turn your visitors into customers.

Sustainable WordPress web design studio

Shinsei Studio is a web studio specialized in custom WordPress development and sustainable web design. We build business websites, WooCommerce stores and bilingual websites that load fast, rank well and use less energy.

Lean code, built to last. No heavy page builder, no unnecessary plugins: every theme is developed for your project with our own lightweight tool and simple editable blocks, optimized images and responsible hosting.

A long-term partner. From design to redesign and maintenance, we work with businesses, freelancers and agencies worldwide, from our studio in Kyoto, Japan, with regular security and performance checks.

Worldwide · Japan

One studio, three languages

Multilingual websites in English, French and Japanese, for clients around the world.

Built with tools you know
  • WordPress
  • WooCommerce
  • PHP
  • MySQL
  • Cloudflare
Our services

Custom business websites, fast from the very first visit and easy to update.

Explore web design Explore online stores Explore sustainable web design Explore maintenance See pricing
Performance reportExample
98 / 100
380 KBWeight Load time0.9 s
  • Custom theme
  • 0 unnecessary plugins
Online salesExample
3.4 % conversion rate
$75Average order Product page1.1 s
  • 3D Secure payments
  • Synced inventory
Core Web VitalsExample
0.9 s LCP
0.01CLS INP90 ms
  • Load time −62%
  • Structured data OK
Website securityDIY District · real
2,900 attacks blocked in 7 days
100%Uptime Lighthouse mobile90
  • Firewall active
  • Malware scan: 0 threats

Who we work with

The same technical standards, adapted to your market and your customers, wherever they are.

A man on a bicycle checks his phone in front of the Tokyo Skytree
Businesses in JapanA website in English, French and Japanese to grow your business in Japan and beyond.
A parcel handed over a shop counter
Selling internationallyShipping to Europe and the US, customs, duties, rates by country: we know how cross-border e-commerce really works.
A smiling team working around a laptop
Partner agenciesReliable WordPress support, white-label if needed.
Commitment

Measured at every launch

Every website is measured before delivery: you get the figures, and we tell you what each choice (video, galleries, animations) weighs.

68KB First load of our own website
100 Lighthouse score of our website (performance)
3 Languages: English, French, Japanese
0 Heavy page builders: we use our own tool
Work

Projects built to last

Websites built to last: fast, light and easy to evolve.

01 / 03
The DIY District store homepage on a smartphone
DIY District E-commerce
WooCommerceJapanese fabricsFR / EN
The Shinsei Studio homepage on a smartphone
Shinsei Studio Business website
WordPressSustainableEN / FR / JA
Next project

What if the next website here were yours?

Start a project
Your brandReply within 48 h
Pricing

Clear packages, a tailored quote

Three transparent starting points. Each project is then priced precisely to your needs.

One-page or business

WordPress website

A custom website, fast and easy to update, to present your business.

From
$900excl. tax
  • Custom WordPress theme, no heavy page builder
  • One-page from $900, business website (up to 5 pages) from $1,650, excl. tax
  • Responsive and accessible design
  • Technical SEO and Core Web Vitals
  • Multilingual and low-impact version as options
  • Admin training
  • First 3 months of hosting and maintenance free
Explore web design
E-commerceWooCommerce

WooCommerce store

A light, secure online store, designed to sell on mobile.

From
$3,200excl. tax
  • Everything in the WordPress website package
  • Up to 20 optimized product pages
  • Secure payments with Stripe and PayPal
  • Shipping, inventory and invoices
  • Short, mobile-first checkout
  • Sales and conversion tracking
  • First 3 months of E-commerce maintenance free
Explore online stores
Peace of mind

Maintenance & security

Your website hosted by us, protected, backed up and up to date. No contract, price guaranteed for 2 years.

From
$55excl. tax / month
  • Hosting included (servers in France or Asia)
  • WordPress, theme and plugin updates
  • Firewall, malware scan and 24/7 monitoring
  • Daily off-site backups
  • Domain in your name, renewals monitored
  • Repair included if your site is hacked
  • Monthly security and performance report
Explore maintenance
Indicative prices, excluding tax. Websites we build are hosted by us, with the first 3 months of hosting and maintenance free. After that, maintenance is monthly, with no contract and a price guaranteed for 2 years. Detailed quote, free. Get a quote
Journal

Latest articles

Performance, security, sustainable web design: what we learn in the field, explained simply.

All articles
FAQ

Frequently asked questions

Can’t find your answer? Write to us, we reply within 48 business hours.

Ask a question

A one-page website costs $900, a business website starts at $1,650 (up to 5 pages) and a WooCommerce store at $3,200, excluding tax. Hosting, security and updates are included in maintenance: the first 3 months are free with the build, then from $55 a month ($165 for a store), with no contract and a price guaranteed for 2 years. Each project then gets a detailed quote, free and without obligation. To compare with the market, see our guide WordPress Website Cost in 2026.

With us. The websites we build run on our own hosting (in France for Europe, in Asia for Japan), with a CDN for speed. Because we know every installation, updates, security and backups are under control. Hosting is included in the maintenance plan, and your domain name stays in your name: we keep an eye on its renewals. As soon as your website goes live, we hand you a full backup of it: it belongs to you.

No. The build includes the first 3 months of hosting and maintenance for free, while your website settles in. After that, you choose: carry on month to month, with no contract and a price guaranteed for 2 years, or stop. In that case, we move your website to the host of your choice for free.

About 2 weeks for a one-page website, 3 to 4 weeks for a business website and 6 to 8 weeks for an online store, once the content is ready. The exact schedule is set at kickoff.

A website designed to transfer as little data as possible: compressed images, no unnecessary code, few fonts and scripts, responsible hosting. The result: faster pages that rank better and use less energy. How far we go depends on the project: an online store needs great product photos, so we make them lighter without sacrificing them. And if you want to go further, we also build websites with no animations or scripts at all.

Yes. Every website comes with simple content blocks you can edit in WordPress, plus a short training. You manage your texts, images and pages without touching the code.

WordPress is the target of many automated attacks, and most of them exploit outdated plugins. Regular updates, a firewall, monitoring and daily backups prevent most incidents and let us restore the website if something goes wrong.

Yes. We start with a performance, security and accessibility audit, then suggest either targeted optimization or a redesign if it makes more sense. Hosted somewhere else? We can also maintain it where it is, after a free audit.

Yes, it’s one of our specialties. Our own store, DIY District, has shipped from Japan to Europe and the US for years. We know how cross-border e-commerce really works: shipping rates by country or zone, customs declarations and product codes, import duties and taxes (including EU VAT), prices shown in the customer’s currency and a store in several languages. The rules change often, especially in the US: we help you keep up so your customers don’t get a surprise bill on delivery.

Yes, regularly. We provide WordPress support, white-label if needed, from your designs and within your processes.

Yes. We are based in Kyoto and work remotely with clients in Europe, North America and Asia, in English or French, and in Japanese for projects in Japan.

Contact

Let’s talk about your next website, whether it’s a business site, a store or a redesign

Three quick questions to understand your needs. We get back to you within 48 business hours with a first proposal.

  • Free quote, no obligation
  • One point of contact from start to finish
  • Reply within 48 business hours
What is your project?

What budget and timeline?
Budget
Timeline

How can we reach you?

Thank you, your request has been sent.

We will get back to you within 48 business hours.

This visit … · …

This visit

Downloaded
…

Full page · first visit

Normal mode
…
Low-impact mode
…
Median web page
…

Downloaded: what your browser actually received as you scrolled; anything served from cache doesn't count. Full page: every image, for a first-time visitor. CO₂: Sustainable Web Design model v3 (0.81 kWh/GB, 442 g CO₂e/kWh). Median: HTTP Archive, Web Almanac 2024.