There are at least two artists names Bonsai:

1) Bonsai is a musical trio formed by Paulo Braga (piano), Mané Silveira (saxes and flutes) and Guello (percussion). Having 10 years in the musical road, the trio produces a scenographic and universal music, going from the waltz to “baião”, coupling marches and flowing into the “jongo” and jazz, in Brazil. Re-inventions of Victor Assis Brasil, Paulo Bellinati and own compositions.

Description taken from Maritaca's site (Bonsai's label).

2) Bonsai is an indie rock band from San Bernardo, Chile. The members are Salvador García, Javier Moncada and Tomás Basaletti. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.