Nomad Works Inc. (Headquarters: Ginza, Chuo-ku, Tokyo; Representative Director: Kyohei Mochizuki) has launched "GO eSIM," a data communication eSIM service for Japanese individuals traveling abroad, available in 160 countries worldwide. The most significant feature of this service is that almost the entire development process, from planning and design to development and operation, was built in-house utilizing generative AI (Anthropic's Claude). From the website users interact with, to the payment system, the operational infrastructure for integrated management of sales and accounting, and even 24/7 Japanese support, the entire system supporting the service was created by a small team leveraging AI. No membership registration is required. Simply scan the QR code received after purchase to immediately start using data communication in your travel destinations, including Japan. Check the GO eSIM Official Website Key Points of This Release Almost the entire development process built in-house with generative AI (Claude) - from planning, specification design, front-end/back-end development, to the administration screen. Supports 160 countries worldwide (Asia, Europe, North America, Central and South America, Africa, Oceania). Two systems, "Unlimited Plan" and "Data Plan," are available for all supported countries. No membership registration required, usable immediately after purchase. Simple setup by just scanning a QR code. Affordable price starting from \u00a5500/day (Taiwan, Unlimited Plan). 24/7 AI support available. Launch Commemoration: First-time 10% OFF coupon distributed (until August 31, 2026). "How far can services be built with AI?" - Almost the entire development process built in-house with generative AI. "GO eSIM" began as a project to answer the question of whether a service can be fully built by a small team using AI. Traditionally, launching a web service required significant personnel and time for each stage, including requirements definition, design, fr