Sisu

“Sisu is a Finnish concept described as stoic determination, tenacity of purpose, grit, bravery, resilience and hardiness and is held by Finns themselves to express their national character.”

Shibui

“A Japanese aesthetic of simple, subtle, and unobtrusive beauty. An enriched, subdued appearance or experience of intrinsically fine quality with economy of form, line, and effort, producing a timeless tranquility.”

(Wikipedia)