ShopifyからHeadless LGD Eコマース移行

No. Your Shopify Plus checkout stays exactly where it is. The migration replaces only the storefront layer -- product pages, collection grids, search, and content -- with a Next.js front end connected through the Shopify Storefront API. Cart creation, checkout flow, payment processing via Shop Pay, Affirm, or Klarna, and order management all remain on Shopify. Your PCI DSS compliance scope does not change. Customers add to cart on the Next.js storefront and complete purchase on your existing Shopify checkout. Gift cards, discount codes, and Shopify Scripts transfer without modification. We test every checkout path during the dual-stack QA phase before cutover, including abandoned cart recovery flows and post-purchase upsells.

Most lab-grown diamond migrations with 50,000+ SKUs complete in 12-14 weeks. Week 1-2 covers catalog audit and app dependency mapping. Week 3-4 locks architecture and Sanity schemas. Week 5-9 is the core build: PDPs, search, configurators, and CMS integration. Week 10-12 runs dual-stack QA where both Liquid and Next.js serve traffic simultaneously. Week 13-14 handles DNS cutover and 30-day post-launch monitoring. Catalogs with more than 100,000 SKUs, complex configurators for fancy shapes, or five-plus locale deployments can extend the timeline to 16-18 weeks. We scope this precisely during the audit phase so you have a fixed timeline before signing.

Migration pricing ranges from $80,000 to $250,000 depending on catalog size, configurator complexity, locale count, and custom integration requirements. A 50K-SKU catalog with standard 4C filtering, one 360-degree viewer, and two locales typically falls in the $80K-$130K range. Brands with 100K+ SKUs, advanced ring configurators with real-time pricing, five or more locales, and RapNet or IDEX feed integrations run $150K-$250K. The investment pays back through app stack savings alone. If you currently spend $8,000/mo on apps, a 70% reduction saves you $67,200 per year -- meaning a $130K project breaks even in under 24 months before counting conversion rate improvements from faster page loads.

Not if redirects are handled correctly, and that is why we build a complete 301 redirect map during the audit phase. Every URL in your existing Shopify sitemap gets a corresponding Next.js route. We validate these against Google Search Console data so no indexed URL returns a 404. Structured data markup is upgraded during the migration -- every PDP gets schema.org Product, Offer, and AggregateRating with IGI or GIA certification fields embedded. Dual-stack rollout means we can test crawl behavior on staging URLs before touching your production domain. Post-cutover, we monitor indexing status, crawl budget allocation, and keyword positions daily for 30 days. Most clients see ranking improvements within 6-8 weeks as Core Web Vitals scores jump from the 50s to 88+.

Every certification field in your Shopify product metafields -- IGI report number, GIA certificate number, 4C grades, fluorescence rating, symmetry, polish, treatment disclosure, and growth method (CVD or HPHT) -- maps to structured Sanity schemas and Next.js PDP templates. During the audit phase, we catalog every metafield your existing Liquid theme reads and verify data integrity across all 50K+ SKUs. The new PDPs render cert data server-side with proper schema.org markup so Google Shopping and AI search tools can parse grading details directly. If you pull live cert data from IGI or GIA APIs, we integrate those endpoints into the Next.js data layer with caching to avoid rate limits. AGTA disclosure requirements for treatment status render automatically based on the treatment field value.

Yes, but selectively. Apps that operate at the checkout or order-management level -- Affirm, Klarna, loyalty point redemption at checkout, shipping calculators -- continue working because your Shopify backend is unchanged. Apps that inject scripts into the storefront theme -- review widgets, search overlays, popup tools, analytics pixels -- get replaced by native Next.js components or server-side integrations. During the audit, we classify every app into three buckets: keep (checkout/order layer), replace (custom-built in Next.js), or eliminate (redundant). Most brands running 8-15 apps drop to 3-5 post-migration. The replaced apps account for the bulk of your $4K-$12K/mo spend, which is where the 60-80% cost reduction comes from.

Sanity CMS manages all non-transactional content: collection landing pages, origin and process stories (CVD vs. HPHT), AGTA compliance notices, buying guides, melee parcel descriptions, and locale-specific marketing copy. Product transactional data (price, inventory, variants) stays in Shopify as the source of truth. Sanity schemas are custom-built for your LGD catalog structure with fields for growth method, cert body (IGI, GIA, AGS), treatment status, and fluorescence grade. Your marketing team publishes and previews content changes in real time without filing developer tickets. Content is delivered to Next.js via Sanity's GROQ API with sub-100ms response times on Vercel's edge network. Structured references link Sanity editorial content to Shopify products by handle, so a blog post about emerald-cut LGDs can embed live product cards with current pricing.

You keep it. Shopify Plus remains your commerce backend -- handling checkout, payments, order management, inventory, and fulfillment. Your Shopify Plus subscription fee stays the same. What changes is your total cost of ownership: the app subscriptions layered on top of Shopify drop by 60-80%, and your dev team stops spending 40% of capacity on Liquid workarounds. Some brands renegotiate their Shopify Plus contract at renewal because they no longer need certain Plus-tier features like Shopify Scripts (replaced by Next.js logic) or Launchpad (replaced by Sanity scheduled publishing). We do not lock you out of Shopify admin. Your ops team still manages orders, refunds, and inventory in the same Shopify dashboard they use today.