Seattle--AdRelevance, an Internet advertising measurement company, announced Wednesday that its AdRelevance Service now tracks online ads for business-to-business marketers. Next month, AdRelevance plans to release a report that examines online advertising trends among top companies in the b-to-b space. The report will be posted during the latter part of March on the company's Web site, www.adrelevance.com. AdRelevance tracks advertising on more than 3,000 Web sites to provide its customers with information about advertising effectiveness. Separately, AdRelevance's parent company, New York-based Media Metrix, announced Wednesday the launch of Media Metrix Japan, which will measure unique visitors on Japanese Web sites.