You are putting together a shortlist of API providers in Japan and Korea, and you remember the region page from August. It held 157 providers and was led by two payments companies, PAY.JP at 73.2 and PortOne at 66.3. You plan to start there. Then you open the page again and the numbers have moved.
The region now holds 284 providers, nearly double what it held two months ago. The top has gone down while the roster went up. PAY.JP is now 62.5, which puts it in the strong band. PortOne is 47.1, developing. The post says plainly that the region got bigger and its top got lower, and that both facts deserve a reason.
The current leaders, with scores from each provider file as scored 2026-10-17, are these. LINE is first at 72.7 and is the only exemplar in the region; its Agent Readiness is agent-native. SAKURA internet follows at 63.7, then PAY.JP at 62.5. Actionpower and 3-shake are both at 57.0, AB180 is at 55.2, and JPX is at 51.6 and sits in the developing band.
You might assume the payments companies got worse. The post asks you to check the rubric first. PAY.JP and PortOne each fell 8.3 points at the last scoring run, from 70.8 and 55.4. Soracom, the region's connectivity anchor in August at 63.9, is now 51.5. All three were scored on rubric 0.24.0. A rubric release moves every score at once, and a drop of the same size on two unrelated payments companies looks more like a measurement change than a provider change. The author says the record alone does not let them attribute the drop to PAY.JP or PortOne, and they decline to. You should hold the same line: the drop is a fact about the score, not proof about the company.
Next you wonder where 127 new providers came from. Membership comes from three signals: a regional tag, headquarters, or a name pattern. Of the 284 rows, 174 were admitted by tag alone, 74 by headquarters and tag, 20 by headquarters alone, and 16 involve a name match. The name patterns include Toyota, Honda, Nissan, Hyundai, Kia, Samsung and Sony. They pull in the region's best-known companies alongside its weakest records: Toyota at 29.7, Nissan at 9.1, Honda at 8.9, Hyundai Mobis at 5.2, Toyota Connected at 3.9 and Toyota Motor Corporation at 2.8.
That changes what you thought you knew. The August post said the region was strong in automotive. By the record, the automakers are present, not published. Across all 284 providers, 156 are minimal and 68 are emerging. Seven are strong and one is exemplar.
Then you reach the part where the catalog files something against itself. Tag-only admission also lets in providers that are not from the region. TheCarApi ranks fourth at 58.2, and its own description is a price surface across 39 European markets. The post calls that the catalog's defect: a tag got it in, and the region page should not count it. There is a second mismatch. The region header claims 820 APIs, while the provider files of its 284 members sum to 339. The author cites the files.
So you adjust your shortlist. A European listings API does not belong in it, and neither does any score you read as a verdict on a company when the rubric changed underneath it.
What you take away is this. The real Japan & Korea API market on apis.io is a short list: LINE, SAKURA internet, PAY.JP and a handful of Korean developer-tool companies. What would move it is the automakers publishing the connected-car contracts they already run. On the catalog's side, it means tightening tag admission so a European listings API stops ranking fourth in Japan. Until then, you read the roster size, the header counts and the score drops with care, and you trust the provider files over the page summary.
Read the original: https://apis.io/2026/10/22/japan-korea-nearly-doubled-to-284-providers-and-its-leaders-fell/