Japanese is not just another language to add to your Shopify store - it is three writing systems operating simultaneously, a layered honorific structure, and a consumer base of 90 million online shoppers who will leave your store in seconds if the language feels off. To translate Shopify to Japanese effectively, you need an approach that handles the linguistic complexity most translation tools simply cannot manage.
Three Scripts, One Language
Every sentence on your Japanese Shopify store will likely use all three of Japan’s writing systems. Understanding when each applies is essential to producing natural-sounding product content.
Kanji are Chinese-origin characters used for most nouns, verbs, and adjectives. “Leather bag” becomes a kanji compound. “Handmade” uses kanji. Your product descriptions will be primarily kanji-based, and choosing the right characters matters - some kanji are considered too formal or archaic for casual shopping contexts.
Katakana is used for foreign loanwords and brand names. Your brand name will almost certainly be rendered in katakana. English-origin product terms like “sneakers” (suniikaa), “organic” (ooganikku), or “design” (dezain) use katakana. Getting the katakana rendering wrong for your brand name is one of the most visible mistakes a store can make.
Hiragana handles grammatical particles, verb endings, and native Japanese words that are conventionally written without kanji. It is the connective tissue that makes sentences flow naturally.
A product listing that uses the wrong script for the wrong word looks immediately wrong to Japanese readers - the way a store mixing cursive and block letters randomly would look to English readers. LocaleFlow’s AI follows standard Japanese writing conventions, selecting the appropriate script based on word origin, context, and contemporary usage norms.
Keigo: The Honorific System You Cannot Ignore
Japanese has multiple levels of politeness built into the language itself, collectively called keigo. This is not optional decoration - using the wrong level is a serious cultural error in commercial contexts.
Teineigo (polite form) is the baseline for ecommerce. Product descriptions, collection pages, and blog content typically use this level. Sentences end with “-masu” and “-desu” forms. This is what most shoppers expect when browsing.
Sonkeigo (respectful form) elevates the customer. It is used in customer service communications, return policies, and any content that directly addresses the buyer. Phrases like “please enjoy” or “we appreciate your purchase” require sonkeigo to sound professional.
Kenjougo (humble form) lowers the speaker (your brand) relative to the customer. Shipping notifications, support responses, and order confirmations often use this level to show appropriate deference.
Most translation tools either ignore keigo entirely (producing rude, overly casual output) or apply it inconsistently. LocaleFlow lets you specify the politeness level via custom prompts, and the AI applies it uniformly across your entire store. For more on how language nuance impacts ecommerce conversion, see our guide to common Shopify translation mistakes.
Layout Considerations for Japanese
Japanese characters are full-width, meaning each character occupies a square space rather than the variable widths of Latin alphabet letters. This affects your Shopify theme in specific ways.
Product titles compress. A 60-character English product title might need only 20-25 Japanese characters to convey the same information. This means Japanese titles often fit more comfortably in product cards and grid layouts.
Line breaking behaves differently. Japanese text can break between almost any two characters (with some exceptions), so word-wrapping is more flexible than in English. However, breaking in the wrong place can split a word awkwardly.
Numbers and measurements. Japanese ecommerce uses a mix of Arabic numerals and Japanese conventions. Clothing sizes, weights, and dimensions need localized formatting - not just translated units but the correct presentation format.
LocaleFlow handles these formatting differences as part of the translation process, producing Japanese content that fits naturally into standard Shopify themes without manual layout adjustments.
Japanese SEO: A Different Search Landscape
Google holds about 75% of Japan’s search market, with Yahoo Japan (which also uses Google’s search engine) covering most of the rest. Japanese SEO works differently from English SEO in important ways.
Japanese search queries tend to be shorter but more specific, because kanji compounds pack more meaning into fewer characters. A single four-character kanji compound can express what takes five English words. Your meta titles and descriptions need to be optimized for how Japanese shoppers actually type their queries, not for literal translations of your English keywords.
LocaleFlow translates all SEO fields - meta titles, meta descriptions, and URL handles - with natural Japanese phrasing. Combined with Shopify Markets’ hreflang setup, your Japanese pages get properly indexed for Google.co.jp. For a comprehensive SEO setup guide, see our multi-language SEO guide.
Clear Tiers, Full Japanese Support
LocaleFlow uses clear tiers with no metering. Local is $49/month for up to 2 languages - Japanese on its own, or Japanese plus one more market. Global is $150/month for unlimited languages as you keep expanding. Japanese is one of the most expensive languages for human translation due to its complexity, but with LocaleFlow it costs the same as any other language on your plan, with no word counts and no per-character billing.
Ready to reach 90 million Japanese online shoppers? Install LocaleFlow from the Shopify App Store and start translating to Japanese today.
Written by Kwadwo Adu, Co-founder of LocaleFlow