In May 2007, he ranked 5th on the global YouTube weekly play rankings, which put him in the limelight. In the same year, his phrase of "it doesn't matter" reached the Top 10 ranking for Buzzword of the Year. In 2014, Kojima obtained a NESTA (National Exercise and Sports Trainers Association) certification for Kids Coordination Training. With his fresh jokes, he brings smiles and energy to all of Japan. In his private life, Kojima is learning English in a variety of ways, such as living with an American teacher and actively communicating with people from other countries in tourist areas.