Chisoku

Being content with what you already have. You don't need more stuff, or new stuff, just because it exists. You're being marketed at, or marked.

Do you need it or do you want it? Need is finite, want is infinite.

Wabi Sabi

Beauty in imperfection. As things begin to wear, they develop some character that can make them nicer than something that is fresh. It's the opposite of new shiny thing syndrome.

Mitate

An object has more than one purpose. Repurposing, inventing, adapting, etc is interesting and a mini achievement that can be celebrated.

Source.