Wisenut

Wisenut is a Korean and Japanese search engine that has indexed well over 1.5 billion pages. Search results are clustered into categories. Preferences settings include search by language and a filter to remove adult content.

Paid inclusion and free listings for non-commercial sites.

More information about them, from the website:

It is an intelligent search engine in that it does much data-mining analysis to guide the user describes their information need, assist the searching, ranking and presentation of the search result. The aim is to provide the information that best fits the users' need and help users to make informative decisions. At the same time, it is built to handle large amount of data in a very efficient manner with effective system resource utilization.

...and there you have it!

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