# LLM API Latency from Japan - Real-time Benchmarks

TL;DR: Japan developers see 710-980ms median latency in the current llmping benchmark snapshot. Best provider for Japan right now: OpenRouter.

Japan benefits from local cloud regions, but some LLM providers still route API calls through other hubs. Tail latency needs special attention.

## Current latency


| Provider | Model | Region | P50 | P95 | P99 | TTFT | Tokens/sec | Samples | Collected at |
|---|---|---|---:|---:|---:|---:|---:|---:|---|
| OpenRouter | router-best | Japan | 710ms | 1685ms | 2520ms | 804ms | 55 | 1440 | 2026-05-12T13:52:00Z |


## Best provider for Japan by use case

| Use case | Winner | Reason |
|---|---|---|
| Real-time chat | OpenRouter router-best | Best Japan row in the current snapshot. |
| Customer support automation | Provider with Tokyo routing | Location certainty matters more than brand name. |
| Batch translation | High-throughput flash-class models | Total tokens per second matters more than first token latency. |

## How Japan developers can reduce latency

- Record provider endpoint, cloud region, and measured client region in every benchmark row.
- For Japanese-language workloads, measure response quality and latency together because the fastest model may not be acceptable.
- Use P95 as the product SLO because median latency hides intermittent routing penalties.