The Sumitomo Spirit

The Sumitomo Spirit has its roots in the guiding principles of Monjuin Shiigaki the Aphorisms of Monjuin written by Masatomo Sumitomo (1585-1652), founder of the House of Sumitomo.

These aphorisms set forth the ideal of conducting business with integrity and prudence.

Over the centuries, as Sumitomo grew primarily through its copper operations, this spirit evolved and deepened. Its core values were formally established in the "Business Principles of 1891.

Today, the Sumitomo Spirit reflects not only these principles but also the wisdom and beliefs of generations of Sumitomo leaders, preserved through significant remarks and the reasoning behind key business decisions. It remains the cornerstone of our Group's management philosophy and the foundation for every decision made by our employees across all operations.

Business Principles

Article 1

萬事入精
Banji-nissei

“Do your sincere best, not only in business but also in every aspect of your life.”

Originating from the preamble of Monjuin Shiigaki, it emphasizes the importance of sincerity in all human endeavours. This principle is a cornerstone of the Sumitomo Spirit. Accordingly, Sumitomo personnel are expected to approach their work not merely as a means of earning profit, but as an opportunity to cultivate character and strive toward becoming better individuals.

Article 2

信用確実
Shinyo-kakujitsu

“Place importance on integrity and sound management.”

This principle emphasises the importance of trustworthiness.

Figure of Masatomo Sumitomo (Monjuin) (Sumitomo Historical Archives)

Article 3

不趨浮利
Fusu-furi

“Do not act rashly or carelessly in pursuit of immoral business.”

This principle affirms the Importance of aligning business success with the broader public interest, while exercising sound judgment to avoid impulsive decisions aimed at short-term gains or any pursuit of profit through unethical or dishonest practices.