# Test your site and app as users in East Asia see them

> Test your own site or app as users in Japan, South Korea, Taiwan and Hong Kong see it: language, currency, payments, redirects. 1 GB $2.62, no KYC.

- URL: https://japanproxies.com/use-cases/localization-testing/
- Last updated: 2026-10-14
- Publisher: JapanProxies (https://japanproxies.com)

Localization bugs often appear only for visitors who really are in the country. A local residential IP lets your QA team see them before customers do.

**Quick answer — How do I test my website's Japanese or Korean version from abroad?**

Run your test browser through a residential IP in the target country and set the matching browser language and time zone. Your site then sees a visitor in Japan, South Korea, Taiwan or Hong Kong, so geo-based redirects, currency, payment options and legal notices behave as they will for real users. **JapanProxies** sells those IPs from $2.62 for 1 GB, with no KYC and payment in crypto.

## What breaks in East Asian localization?

Common problems to test for:

- **Geo redirects.** A visitor in Japan is sent to the English or global site, or loops between two versions.
- **Currency and prices.** Prices shown in US dollars, or yen prices with decimals (the yen has no subunit in everyday prices).
- **Payment options.** Local methods missing for the country, such as convenience-store payment in Japan or local card brands and wallets in Korea and Taiwan.
- **Language negotiation.** The site reads only the IP or only `Accept-Language`, so a Japanese visitor with an English browser gets the wrong page.
- **Legal notices.** Japanese online shops must show a notice under the Act on Specified Commercial Transactions; Korean, Taiwanese and Hong Kong pages have their own notice and privacy requirements.
- **Fonts and line breaks.** Japanese, Korean and Chinese text overflowing buttons or breaking in the wrong place.

## Why a residential IP and not just a language setting?

Many sites and CDNs decide the country from the IP address: they redirect, set the currency or hide products before the browser language is read. A language setting alone does not trigger that logic. A residential IP in the country does, because it is the kind of address your real users have.

A datacenter IP can be placed in the right country too, but many fraud and bot-management systems treat hosting ranges differently from home connections. Testing from a home connection shows the path your customers take.

## How do I set up a localization test?

1. Pick the country code: `jp`, `kr`, `tw` or `hk`, with a sticky session for each test run.
2. Set the browser locale and time zone to match: `ja-JP` and `Asia/Tokyo`, `ko-KR` and `Asia/Seoul`, `zh-TW` and `Asia/Taipei`, `zh-HK` and `Asia/Hong_Kong`.
3. Test two cases: a local visitor with a local browser language, and a local visitor with an English browser.
4. Record the IP country your own logs saw, next to each screenshot.

For mobile apps: on an iPhone or iPad, use Wi-Fi → Configure Proxy → Manual, with authentication; on the Android emulator, start it with `-http-proxy http://USERNAME-country-jp-session-qa1-ttl-30:PASSWORD@gw.japanproxies.com:7777`. Android's Wi-Fi proxy setting has no password field, and some apps ignore the system proxy. For tests that must come from a mobile carrier network, a dedicated 4G/5G port in Japan or South Korea is available from $5.93 per day.

*Playwright (Node.js): one test per market*

```javascript
import { chromium } from "playwright";

const markets = [
  { cc: "jp", locale: "ja-JP", timezoneId: "Asia/Tokyo" },
  { cc: "kr", locale: "ko-KR", timezoneId: "Asia/Seoul" },
  { cc: "tw", locale: "zh-TW", timezoneId: "Asia/Taipei" },
  { cc: "hk", locale: "zh-HK", timezoneId: "Asia/Hong_Kong" },
];

for (const m of markets) {
  const browser = await chromium.launch({
    proxy: {
      server: "http://gw.japanproxies.com:7777",
      username: `USERNAME-country-${m.cc}-session-qa${m.cc}-ttl-30`,
      password: "PASSWORD",
    },
  });
  const context = await browser.newContext({ locale: m.locale, timezoneId: m.timezoneId });
  const page = await context.newPage();
  await page.goto("https://YOUR-SITE.example/");
  await page.screenshot({ path: `home-${m.cc}.png`, fullPage: true });
  console.log(m.cc, "landed on", page.url());
  await browser.close();
}
```

## What does localization testing cost?

A full page load in a browser often uses two to five megabytes. A release test of a few dozen pages in four markets fits in 5 GB; continuous tests in a CI pipeline may need 50 GB. One plan covers the four markets and never expires.

| Plan | Quantity | Price | Price per unit |
| --- | --- | --- | --- |
| Test | 1 GB | $2.62 | $2.62/GB |
| Light | 5 GB | $4.95 | $0.99/GB |
| Standard | 10 GB | $6.60 | $0.66/GB |
| Team | 50 GB | $26 | $0.52/GB |

In every plan: Japan, South Korea, Taiwan and Hong Kong · Rotating and sticky sessions · HTTP, HTTPS and SOCKS5 · Traffic never expires

**Before you pay**

- Minimum top-up $25. Top up once in crypto, then buy any plan from your balance.
- Unused balance stays on your account and never expires, but it is not paid back, except where the law requires it.
- Credited once your payment is checked on the blockchain. Typical network confirmation time: BTC ≈ 20 min · USDT TRC-20 ≈ 1 min · USDT ERC-20 ≈ 5 min · USDC ERC-20 ≈ 5 min · ETH ≈ 5 min · SOL ≈ 1 min · LTC ≈ 15 min

## Localization testing questions

### Can I run these tests in CI?

Yes. Store the proxy username and password as CI secrets and run a browser test per market. Use a new session ID for each run, and keep the run small: a localization test needs a few pages, not a crawl.

### Does the App Store or Google Play region change with the IP?

No. App stores decide the storefront from the account's country, not from the IP. A proxy helps test what your app does once installed: its content, prices and API responses for a user in the country.

### Can I test a CDN or geo-routing rule?

Yes. Request your own site through each country code and compare the response headers, redirects and content. Check what country your CDN logs record for the request.

### What if my site thinks a Japanese IP is in another country?

Your geolocation database may be out of date for that address. Compare two or three databases and update yours; see [why a proxy shows the wrong location](https://japanproxies.com/guides/check-proxy-location/).

### Do I need a separate plan per country?

No. One plan covers Japan, South Korea, Taiwan and Hong Kong: change the country code in the username.

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JapanProxies: JapanProxies is a residential proxy provider for Japan, South Korea, Taiwan and Hong Kong: rotating residential IPs billed per GB, with traffic that never expires, paid in crypto with no KYC — no ID, no selfie, no documents.