The rebar is a stick-shaped rolled steel material formed from irregular nubs called ribs and joints that are used as a building construction material. As Kama-Asa Shop's policy is set on belief that good tools are made for good reason, it delivers to the customers excellent skills of craftsmen, which make kitchen utensils. Therefore, the most appropriate for the shop's space was to show architectural skills of craftsmen. The rebar that is usually hidden in the wall became the main design.

Masahiro Yoshida, the representative of Kamitopen Corp. Born in Osaka in 1977 is the representative of Kamitopen Corp. Office with a first class architect license. 2001 Graduated from Kytoto Institute of Technology (seminar of Waro Kishi) 2007 Establishment of Kamitopen Main works "nana's green tea", "Kama asa shoten", "Majimaya Confectionery Tools Store" and others. Main awards JCD Designer Award Silver Prize (Nikken Gakuin etc.), SDA Award First Prize (TOIRO), AICA Contest First Prize (nana's green tea in Grand Front Osaka), IDA (America) Gold Prize (TOIRO), International Interior Design Award APIDA Award of Excellence (Hong Kong), iF Design Award (Majimaya Confectionery Tools Store Retail Interior) (Namba and Ikebukuro Reuse Shop), RED DOT DESIGN AWARD RED DOT Prize (Majimaya Confectionery Tools Store) and many others.

“From thought to reality to connection” Clients have their own ideas to express to the public. The ideas can’t be expressed without being converted into ”words”. They also can’t be passed on without being transformed into “forms”. We are the designers who create the “words” and the “forms”. By putting “thoughts” into “words”, which morph into ”forms”, a diverse range of people will be able to read and understand the ideas of the client. This is the “design” that we aim for.