Complex sentence: He trained there for a month before he earned his first black belt in Judo by the Japanese Judo Federation.In Thailand in 2008 and Paris in 2009 he competed at the 14th and 15th Junior World Championships respectively.
Split into simpler sentences: He trained there for a month before he earned his first black belt in Judo by the Japanese Judo Federation. He then traveled in Thailand in 2008 and Paris in 2009 where he competed at the 14th and 15th Junior World Championships respectively.