This fun Japanese contact juggler's clip is proving popular lately, but he is not the first Japanese practitioner of the art to surface online. Here are several more highly entertaining Japanese contact juggler clips worth watching: one, two (starts about 1:06), three, four, five. (all via the highly entertaining Ministry of Manipulation's blog). Unlike traditional juggling, contact juggling focuses on an object keeping contact with the body and is often performed with single or multiple crystal balls. Hate to use a wikipedia link, but it seems to offer the most concise overview of the origin and various styles.