What is “KSK”?
KSK (Mutual aid association; mutual insurance cooperative) is a cooperative used primarily in Japan. It signals limited liability and private ownership.
Where it's used
KSK appears in company names registered in the following jurisdiction:
What it tells you about the company
Equivalent forms around the world
These are the closest structural equivalents to KSK in other jurisdictions — same entity category, different national law.
Normalizing “KSK” in your data
When matching or deduplicating company records, the legal suffix is noise — “Acme KSK” and “Acme” should resolve to the same entity. One API call strips it and returns a stable canonical form:
curl -X POST https://api.ambect.com/v1/normalize/company \
-H "Authorization: Bearer $AMBECT_KEY" \
-H "Content-Type: application/json" \
-d '{"name": "Acme KSK", "country": "jp"}'{
"data": {
"canonical": "acme ksk",
"legal_type": null,
"tokens": [
"acme",
"ksk"
]
},
"meta": {
"pipeline": [
"lowercase",
"legal_suffix"
],
"confidence": 0.99
}
}Frequently asked questions
What does KSK mean?
KSK means "Mutual aid association; mutual insurance cooperative".
Is a KSK public or private?
A KSK is a private entity — its shares are not publicly listed or traded on a stock exchange.
What is the liability in a KSK?
Owners of a KSK have limited liability. Their personal assets are protected, and their exposure is capped at the amount they invested.
Which countries use KSK?
KSK is used in Japan.
Need to normalize KSK at scale? The Ambect API handles it across 100+ countries in under 5 ms.
Try the live normalizer free →