SHOPIFY THEME DEVELOPMENT · Shopify テーマ開発

Japanese Shopify theme development needs long-form product page sections, Japanese font support, and LINE integration — the default theme structure is too minimal for Japanese buyers

Ignited Nepal builds and customises Shopify themes for brands selling in Japan. Shopify 2.0 Liquid and JSON theme development, customisation of Dawn, Impulse, Prestige, and Turbo for Japanese market requirements, and Japan-specific features built into the theme — Japanese web font configuration, long-form product page sections, LINE integration, and mobile image gallery optimisation. Performance optimisation and mobile-first layout work are standard parts of every Japan build.

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Custom Shopify 2.0 sections for artisan origin story and provenance content · Dawn and Debut theme customisation for Nepali export product presentation · LCP improvements for international buyer traffic from AU, US, and EU markets · Mobile-first responsive adjustments for mixed domestic and international visitor bases

This is for you if

Who This Is For (JP)

International brands entering the Japan market on Shopify who need their theme adapted for Japanese buyer expectations. Japanese DTC brands building on Shopify for the first time who need a properly structured Japanese-language product page. Fashion, beauty, homewares, and food brands that require long-form product content sections, Japanese font rendering, and LINE social integration built into the theme.

What's broken

Problems We Solve (JP)

Default theme product page too short for Japanese buyer expectations

Japanese buyers expect comprehensive product information before purchasing: specification tables, material composition details, wash care instructions, size charts with Japanese measurement standards, and origin content. The default Shopify product page template — a product title, price, description field, and add-to-cart button — does not accommodate this depth of content in a structured, readable layout. Custom Liquid sections are required: a specification table section, a care instruction section, a materials section, and a brand story section, each with its own layout and typography designed for Japanese-language reading patterns.

No Japanese web font configured

Shopify's default font library does not include Japanese web fonts. When Japanese kanji, hiragana, and katakana are rendered in a Shopify theme without a configured Japanese web font, the browser falls back to the system font — which varies by device and creates inconsistent typography across iOS, Android, and desktop. Correct configuration requires loading a Japanese web font (Noto Sans JP, Zen Kaku Gothic, or a brand-licensed equivalent) via Google Fonts or a self-hosted font file and defining it in the theme's font settings schema so it applies consistently across all template types.

LINE integration not in the theme

LINE is Japan's dominant messaging and social platform. Japanese DTC brands need LINE Login as an authentication option, a LINE share button on product pages, and a LINE Official Account entry point in the theme header or footer. None of these are available in standard Shopify themes. LINE Login requires an OAuth integration with the LINE Login API at the theme level. The LINE share button requires a correctly structured LINE share URL with product title and image parameters. LINE mini-programme entry points need a custom theme section with the correct deep-link URL format.

Mobile product image gallery not touch-optimised for Japanese browsing patterns

Japanese mobile shoppers review multiple product images extensively before purchasing — more so than the average Western buyer. The default Shopify theme product image gallery uses a basic swipe implementation that does not match the fluidity expected on Japanese e-commerce platforms like Zozotown and Rakuten. A custom touch-optimised gallery with momentum scrolling, pinch-to-zoom, and a smooth thumbnail navigation strip is required to meet the standard Japanese buyers expect from a premium mobile product experience.

What we engineer

How We Work (JP)

We start with a theme development brief that covers the product types being sold in Japan, the depth of product information required, LINE integration requirements, and any existing brand font assets. We configure Japanese web fonts, build the required long-form product page sections in Liquid, integrate LINE Login and LINE share at the theme level, and optimise the mobile image gallery. All section schemas are built so that Japanese-language content can be managed through the Shopify theme editor without code changes.

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What changes

What Changes (JP)

Before

After

Before International buyers purchasing handmade Nepali products are not just buying a product — they are buying the story behind it: who made it, where the materials come from, and why it is made the way it is. Dawn's default product template has no structure for this content. Without custom Liquid sections for artisan portrait, origin location, and production process, that story gets buried in a product description paragraph that most buyers do not read fully. The theme needs to carry that narrative visually and structurally, not as an afterthought in a text block.

After When the theme carries artisan portraits, provenance content, and production story sections as structured visual elements — not as paragraphs in a text field — international buyers understand what they are buying without effort. The credibility gap between your products and a generic DTC store closes at the theme level.

Before International buyers on Australian NBN or US broadband will tolerate a four-second load time once and abandon at five. But Nepali domestic visitors browsing on average 4G connections experience far longer waits when the theme loads full-resolution hero images, multiple app scripts, and undeferred fonts all at once. Adaptive image loading, properly compressed image formats (WebP), and deferred loading for non-critical scripts are Liquid and theme.liquid changes — they are not something you can fix through Shopify's basic theme editor.

After With WebP images, deferred scripts, and responsive srcsets in place, your store loads fast enough that Australian and US buyers stay on the page. Abandoned sessions caused by slow load are not a content problem — they are a theme performance problem that custom development resolves.

Before Dawn's default product template gives you a product image, a title, a price, an "add to cart" button, and a description field. For a commodity product, that is sufficient. For a hand-knotted Dhaka textile or a silver Newari pendant, the product page needs sections that the default template cannot deliver without custom development: a "how it's made" accordion, a materials origin block, a maker profile component, and a care instructions section with custom styling. These sections require Shopify 2.0 JSON template development in Liquid.

After Subscription products, one-of-a-kind artisan pieces, production-run items, and wholesale listings each render on a template built for their type. The right information appears in the right place for each product, rather than a product description field carrying everything.

Before An international buyer on your Shopify store needs to know before adding to cart: how long shipping to their country takes, what the customs or duty situation is for their market, whether the sizing matches their measurement system (centimetres vs. inches), and what the return process is if the product does not match the description. When these are delivered through app pop-ups or buried in a FAQ page linked from the footer, conversion drops. They need to be built into the product page template as custom theme sections — visible, credible, and consistent across your catalogue.

After When customs, shipping timelines, size guides, and returns information are built into the product page template, the questions that prevent add-to-cart are answered at the point of decision. Buyers from Australia, the US, and Europe do not need to search your FAQ page — the information is where they expect it.

How it works

Process

01

Theme Audit and Brief
Week 1

We audit your current Shopify theme: performance scores (LCP, CLS, FID on mobile and desktop), section structure, product page template, collection page layout, and installed apps injecting scripts into the theme. We review your product catalogue to understand what content types your templates need to support. You receive a written audit and a theme development brief before any code is touched.
02

Design and Section Specification
Week 1-2

We define the sections to be built or customised: section name, content fields, display logic, and mobile/desktop layout. For new custom sections we produce a component-level layout spec. You approve the spec before development starts.
03

Development and QA
Week 2-4

We build sections in Liquid and JSON templates, implement performance fixes, and complete responsive adjustments. We test across Chrome, Safari, and Firefox on desktop and mobile at multiple viewport widths. We test in your Shopify theme editor to confirm sections are configurable without code.
04

Staging Review and Launch
Week 4-5

We deploy to a Shopify theme duplicate (not your live theme) for your review. You test content editing, product page display, and mobile experience. We incorporate feedback, complete a final performance check, and publish to your live theme.
05

Handover and Documentation

We provide section-level documentation for your team: how to configure each section in the Shopify theme editor, what each field controls, and how to add or duplicate sections across pages. You are not dependent on us for routine content updates.

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Common questions

FAQs (JP)

How do I add Japanese web fonts to a Shopify theme?

Japanese web fonts can be added to a Shopify theme by loading a font family from Google Fonts (Noto Sans JP, M PLUS Rounded 1c, or similar) via the theme's `layout/theme.liquid` file, or by uploading self-hosted font files to the theme's `assets` folder and referencing them in the CSS. The font must be added to the theme's settings schema (`config/settings_schema.json`) if it is to be selectable in the theme editor. Without this configuration, Japanese characters fall back to the system font, which varies by operating system and device, creating inconsistent rendering.

How do I build a long-form product page in Shopify that meets Japanese buyer expectations?

Long-form product pages in Shopify are built by creating custom JSON template sections that each handle a distinct content type: a specification table section, a materials and composition section, a care instruction section, and an origin or brand story section. Each section is schema-defined so its content can be edited in the theme editor. These sections are added to the `product.json` template in the correct reading order for Japanese buyers — specifications and materials before the add-to-cart button, brand story below. The product description field alone is not sufficient; structured Liquid sections are required.

How do I integrate LINE Login and LINE share into a Shopify theme?

LINE Login is integrated at the theme level using LINE's Login API v2.1. The implementation requires registering a LINE Login channel in the LINE Developers Console, adding the LINE Login JavaScript SDK to the theme's `layout/theme.liquid`, and creating a custom Liquid section or snippet that renders the LINE Login button and handles the OAuth callback. The LINE share button is a simpler integration — a link element formatted as `https://social-plugins.line.me/lineit/share?url={encoded_product_url}` — but it should be placed in a custom theme section with the correct icon and label rather than a generic share bar.

Which paid Shopify themes have the best support for Japanese language rendering?

Prestige and Impulse both support Japanese text well in terms of layout width and line spacing, but neither includes Japanese web fonts or long-form product sections by default. Turbo is used by some Japanese brands for its speed and section flexibility. In practice, any Shopify 2.0 theme requires Japanese font configuration and custom section development to meet Japanese buyer expectations — the base theme choice matters less than the customisation applied on top of it. Dawn is a viable starting point for a fully custom Japan build.

How do I optimise a Shopify theme product image gallery for Japanese mobile shoppers?

The default Shopify product image gallery uses a CSS scroll snap implementation. For Japanese mobile buyers, this needs to be replaced with a custom JavaScript gallery that uses momentum-based touch scrolling (via the Intersection Observer API or a lightweight touch library), pinch-to-zoom support via the touch event API, and a thumbnail strip at the bottom of the gallery for direct image navigation. The gallery should also support a larger number of images without performance degradation — Japanese product pages commonly use 8 to 15 images per product. Lazy loading for gallery images beyond the first two is standard practice.

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