Key facts
| Deployment models | Region-locked cloud planes, private endpoint in your VPC, on-prem and air-gapped |
| Plane for this market | APAC plane, Singapore (ap-southeast-1) is nearest; Japanese residency needs a customer-managed deployment |
| Models | 30+ models behind one OpenAI-compatible API |
| Pricing | Flat monthly self-serve plans, no per-token billing; see the live pricing page |
| Residency enforcement | Architectural region lock; prompts, completions, embeddings and logs stay in-region |
| Access control | Scoped API keys, RBAC, SSO/SCIM and SIEM-exportable audit logs |
| Compliance alignment | The APAC plane is aligned with PDPA and MAS expectations |
| Product status | Chat, streaming, JSON mode, function calling, embeddings and agents are live |
TL;DR
- Pin the APAC plane (Singapore) or deploy in your own network to meet the APPI.
- The same OpenAI-compatible API works across every deployment model, so no rewrite is needed.
- 30+ models, from free plugsky-micro and plugsky-lite to frontier reasoning tiers.
- Self-serve pricing is flat monthly; no per-token billing - see the live pricing page.
- Enterprise adds BYOK, zero-knowledge mode, audit export and right-to-audit clauses.
How it works, step by step
- Map your data classes and decide which must stay in Japan.
- Pick a deployment model: the APAC plane (Singapore), private endpoint, on-prem or air-gapped.
- Create a workspace and issue scoped API keys per environment and team.
- Point your OpenAI-compatible client at api.plugsky.com and map model names.
- Configure prompt retention, RBAC/SSO and audit export to your SIEM.
- Run an evaluation set on local-language and local-regulatory cases before scaling.
- Document the evidence path - DPA, sub-processors and residency attestations - for auditors.
Try it yourself
Score your sovereign AI readiness →
What sovereign AI cloud means for Japan
Japan's AI cloud decisions combine APPI compliance with government cloud screening and a strong preference for local-language quality. Evaluation is typically rigorous before scaling. Tokyo (AWS ap-northeast-1, Azure Japan East) anchors domestic capacity, while ISMAP registration shapes which services government and regulated buyers can use.
Sovereignty is an architecture decision covering processing location, storage location, key custody and audit evidence. Plugsky separates these layers, so you can adopt a strict posture for one workload and a lighter one for the next without running two platforms.
Regulatory context: the APPI
The Act on the Protection of Personal Information (APPI), amended in recent years, governs processing and cross-border transfer, with the Personal Information Protection Commission (PPC) as regulator. ISMAP registration is the de facto baseline for cloud services used by government.
Plugsky's response is architectural: the APAC plane is aligned with PDPA and MAS expectations. Prompts, completions, embeddings and logs stay inside the selected plane, and the guarantee does not rest on a contractual promise alone.
Deployment options, from region-locked planes to air-gapped
Japanese teams pin the APAC plane (Singapore) for regional latency, or deploy in-country - VPC, on-prem or air-gapped - for government and regulated workloads.
- Region-locked plane: managed inference in the EU (Frankfurt), GCC (UAE), APAC (Singapore) or US (Virginia), with Riyadh on Enterprise.
- Private endpoint: the same API inside your VPC.
- On-prem: run inside your own data centre.
- Air-gapped: fully disconnected environments for critical infrastructure.
Because the API surface is identical, moving a workload between these modes is configuration, not a rewrite.
Models, pricing and proof
Model choice is configuration: 30+ models behind one endpoint, with plugsky-micro and plugsky-lite free and larger reasoning models on paid plans. Self-serve pricing is flat monthly, and a 14-day full-access trial exists for teams that want to test the full catalogue before committing.
Japanese-language evaluation sets are essential; quality differences between models shrink on English benchmarks and widen in production Japanese. Where Plugsky does not replace other providers yet: audio, images, moderation, files, batch, fine-tuning, assistants and responses are roadmap items. Chat, streaming, tools, JSON mode, embeddings, RAG and agents are live today.
Honest comparison
| Consideration | Plugsky | Global hyperscaler AI | Self-managed in-country |
|---|---|---|---|
| Residency enforcement | Region-locked planes plus VPC, on-prem and air-gapped | Contractual commitments across shared regions | You build networking and controls |
| Model access | 30+ models on one OpenAI-compatible API | Vendor catalogue per platform | You serve and patch every model |
| Pricing | Flat monthly self-serve plans; see the live pricing page | Consumption-based line items | GPU capex plus operations |
| Time to first request | API key and a base-URL change | Platform-specific setup | Weeks to months |
| Audit and keys | Audit-log export, BYOK on Enterprise | Varies by service | You build everything |
Frequently asked questions
How does the APPI affect AI cloud choices in Japan?
The Act on the Protection of Personal Information (APPI), amended in recent years, governs processing and cross-border transfer, with the Personal Information Protection Commission (PPC) as regulator. ISMAP registration is the de facto baseline for cloud services used by government. Japanese teams pin the APAC plane (Singapore) for regional latency, or deploy in-country - VPC, on-prem or air-gapped - for government and regulated workloads.
Can Japan teams keep data in-country with Plugsky?
Japanese teams pin the APAC plane (Singapore) for regional latency, or deploy in-country - VPC, on-prem or air-gapped - for government and regulated workloads. Plugsky publishes region-locked planes in the EU (Frankfurt), GCC (UAE), APAC (Singapore) and US (Virginia), with Riyadh on Enterprise; stricter in-country requirements are met with VPC, on-prem or air-gapped deployment.
Does Plugsky have a data centre or office in Japan?
Plugsky publishes region-locked planes rather than country-by-country facilities, so check /data-residency for the current list. Deployments in your own VPC, on-prem or air-gapped cover requirements that demand an in-country footprint.
Can we keep prompts, embeddings and logs in our jurisdiction?
Yes, on a region-locked plane the processing path - inference, embeddings and logs - stays in the selected region by architecture rather than by contract. Enterprise agreements add customer-managed keys, zero-knowledge mode and right-to-audit clauses.
What deployment models are available?
Four: a managed region-locked plane, a private endpoint inside your VPC, on-premises deployment, and air-gapped installation for disconnected environments. The API surface is identical across all four.
How is pricing structured, and is there a free option?
Self-serve plans are flat monthly with no per-token billing on the free plan or paid tiers beyond it; plugsky-micro and plugsky-lite are free with no card, and a 14-day full-access trial exists. See the live pricing page for current plans.
Which capabilities are live today?
Chat completions, streaming, JSON mode, function calling, embeddings, RAG and agent loops are live. Audio, images, moderation, files, batch, fine-tuning, assistants and responses are coming-soon endpoints.
How do we prove residency to an auditor?
Provide the DPA, the current sub-processor list, exported audit logs and a description of the residency architecture; Enterprise contracts add right-to-audit clauses. Keep sub-processor notifications in your evidence trail.