Japanese aesthetic ideals

Aesthetics in Japan is seen as an integral part of daily life and include ancient ideals like:

• Yūgen (幽玄), an awareness of the Universe that triggers emotional responses too deep and powerful for words; ¹
• Wabi, transient and stark beauty;
• Sabi, the beauty of natural aging.

In Zen philosophy there are seven principles for achieving wabi-sabi:

• Fukinsei (不均整), asymmetry, irregularity;
• Kanso (簡素), simplicity;
• Koko, basic, weathered;
• Shizen (自然), without pretense, natural;
• Yugen (幽玄), subtly profound grace, not obvious;
• Datsuzoku (脱俗), unbounded by convention, free;
• Seijaku (静寂), tranquility, stillness.

Source:
Yūgen (幽玄) – Deep Awareness of the Universe

Notes:
¹ The exact translation depends on the context.