Bottleship Inc.

Bottleship is a Japan e-commerce growth partner for overseas brands that want to sell successfully in Japan. 

We act as your in-market team, running your Japanese online business end to end so you can enter and scale without a local office or a Japan-fluent in-house team. Japan is one of the world’s largest and most demanding e-commerce markets, and it rarely rewards a simple “translate and list” approach. Shoppers expect native Japanese copy, tax-included pricing, local payment methods, fast and precise delivery, and listings that read as if a Japanese brand wrote them. Our guiding belief is simple: in Japan, e-commerce is decided by design, not tactics. We help overseas brands across every major Japanese sales channel — Rakuten Ichiba, Amazon Japan, Yahoo! Shopping, and Shopify direct-to-consumer stores.

Our work spans three core services:

1. Marketplace operations and account management — store setup, listing creation and optimization, catalog and inventory health, promotions, and day-to-day operation; 
2. Advertising — Rakuten RPP and Amazon Sponsored Products, Brands, and Display, managed to margin-aware ACoS and TACoS targets so spend builds organic rank rather than renting sales; 
3. Localization and translation — adapting your store, product pages, and brand voice to Japanese language, norms, and regulations so conversion stops leaking.

What sets us apart is that we combine strategy with execution.

We are a small, fast, senior team that operates as your Japan department:

data- and profit-focused, responsive, and accountable for results.

We handle the real barriers that stop most overseas brands —

• marketplace rules,
• Japanese-language policy notices and account health,
• consumption tax (JCT) realities,
• category compliance,
• and how Japanese customers actually decide to buy.

We report in clear English every month, so you always know what is working, what we changed, and what comes next. Whether you are entering Japan for the first time or fixing a stalled