The "Sumitomo Business Spirit" grew out of the guiding principles set down by Sumitomo founder Masatomo Sumitomo in his "Monjuin Shiigaki" (the Aphorisms of Monjuin). This corporate spirit has been developed, deepened, and handed down over generations in the Sumitomo Family enterprise, and its essence was distilled in the Sumitomo's Family Constitution established in 1882, and formulated into two business principles in 1891. Although there were some corrections to the wording, the "Sumitomo Business Principles" have been inherited with no change in the contents up to now.
Sumitomo shall achieve strength and prosperity by placing prime importance on integrity and sound management in the conduct of its business.
Sumitomo shall manage its activities with foresight and flexibility in order to cope effectively with the changing times. Under no circumstances, however, shall it pursue easy gains or act imprudently. Article 1 shows that the basis of the Sumitomo Business Spirit is the attachment of importance to trust, above all things.