These Eco Blocks are made from pieces of camphor tree that grow in the Kyushu region. Wood from this tree is well known for its insect repelling qualities, while its oil has deodorizing effects, and has recently been discovered to have calming qualities as well. Making use of pieces of wood left over from their regular business to make the blocks and the camphor oil, Nakamura has created all natural items that are gentle on the environment in many ways.