The document analyzes US venture capital investment trends in cleantech startups. It finds that between 2006-2010, cleantech investments increased at a 22% compound annual growth rate. In the first quarter of 2011, cleantech investment equaled that of web companies. The analysis also shows that VC investment concentrates on energy production, energy management systems, and batteries technologies. For Japanese cleantech startups, opportunities may be greater in the demand side of smart grid technologies due to direct consumer contact and technological overlaps.