Established his own creative studio, SAMURAI, in Japan in 2000. Kashiwa, one of the world's leading creative directors, delivers a fresh perspective of design to the world. From concept and communication strategy building to developing brand logos, Kashiwa’s ability as a brand architect to identify, elucidate, and visualize the essence of the subject is highly acclaimed in a number of fields.

Selected representative works and clients:
The creative direction of global brand strategies of Uniqlo, the branding project of Seven-Eleven, the producer of CUPNOODLE Museum, the branding for the next century of Yanmar, the corporate branding and small car branding strategy of the 'N' series of Honda, the logo design and signage schemes of National Art Center Tokyo, the creative direction of *OECD/CELE award-winning Fuji Kindergarten, the renovation and establishment of the towel products and industry as "Japan Brand" for Imabari Towel Japan.