OpenAI Enables In-Japan API Processing and Inference for GPT-6 Luna
OpenAI has made generally available in-country request processing and model inference in Japan for GPT-6 Luna on its API, going beyond data storage alone.
SUMO· the number puzzle
Dialo· learn languages by speaking
ediviewer· read EDI files like documents
giftdetect· the right gift in minutesOpenAI on 11 November began general availability of a feature that lets companies run API request processing and model inference for GPT-6 Luna inside Japan. It covers text and image input with text output, and is open to businesses and developers who meet the eligibility conditions.
The move extends a step the company took in May 2025, when it announced data residency for Asia, including Japan, allowing eligible customer data to be stored in the country. Until now that applied to storage. With the new option, the processing of API requests and the inference that generates answers from the input can also happen domestically.
Who it targets and how it works
OpenAI says this should make it easier to adopt AI in sectors that require domestic data handling, such as finance, telecoms, healthcare and government, in line with an organisation's own data policies. Expected uses include document summarisation, drafting replies and supporting information analysis.
The supported endpoints are the Responses API and the Chat Completions API. Customers must first obtain OpenAI's approval for Zero Data Retention (ZDR) and enable it in their API environment. They then create a new API project with Japan selected for both data storage and processing, and use the Japan-specific API endpoint. Only the Standard, pay-as-you-go service tier is supported.
Limits to note
The ChatGPT and Codex apps, models other than GPT-6 Luna, audio, image generation and tools hosted by OpenAI are excluded. Domestic storage and processing apply only to specified customer content; system data such as account information, usage and billing details is not included.
Processing done by customer-managed tools or external services is also outside the scope. As a result, the feature does not guarantee that every step of a workflow is completed within Japan, which compliance teams will need to weigh when assessing their requirements.
Apps worth a look
SUMO: the number puzzleTap the right tiles, add them up, hit the target. Easy to learn, hard to master. Free, for all ages.
Dialo: learn languages by speakingTalk to an AI conversation partner; every sentence comes back corrected and explained in your language. 9 languages, A1 to C2.
ediviewer: read EDI files like documentsOpen EDIFACT and X12 messages, see every segment explained, convert to JSON/XML, export PDF and Excel. Runs locally, no upload.
giftdetect: the right gift in minutesPick who it is for, the occasion and their personality. The search engine reads product descriptions from local shops and ranks what fits. Free, no sign-up.
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