T. Yamamoto spoke at a conference in Yokohama on July 22, 2009 about using Grails, a web framework that uses Groovy and is built on Spring and Hibernate. Grails can be used to quickly develop web applications and up to 90% of new projects use Grails. Yamamoto discussed how to add additional servlets and mappings to a Grails application's web descriptor as well as how to configure additional Spring beans.