Some examples to answer this question include the following: [komorebi is already listed]
Shoganai
Shoganai means ‘it can’t be helped’, but also expresses a conviction that there’s no point in complaining if a situation is out of one’s control. This mentality can be both realistic and fatalistic.
Itadakimasu
Literally means ‘I humbly receive’, is said before every meal, and expresses appreciation for all the work that went into the meal that is about to be eaten. It conveys a respect for all living things.
Ojama-shimasu
A set phrase said whenever you enter someone else’s house, signifying that you know you are going to be a bother and apologise in advance. When using this phrase, you are signifying your own modesty and sense that you are intruding.
Otsukaresamadesu
When said to colleagues at work, you are recognising their hard work. Sometimes it is even used in place of ‘cheers’ when drinking together with friends on a Friday after a hard work week. They might seem like empty phrases, they smooth interactions in stressful workplaces
Shinrinyoku
Literally “forest bath,” shinrinyoku means walking through the forest and soaking in all the green light.
Wabi-sabi
The imperfect, incomplete, and transient nature of beauty. Objects that elicit a sense of quiet melancholy and longing could be defined as wabi-sabi.
Kogarashi
Literally ‘leaf-wilting wind’, kogarashi refers to the withering wind that comes at the start of winter and blows the last leaves off of the trees.
Mono no aware
This means sensitivity or sadness, to connote a pathos engendered by a sense of the fleeting nature of life
Natsukashii
This adjective is commonly used when something evokes a sense of nostalgia for the past or fond remembrance; not a wistful longing, but a happy look back at a past memory, for instance when looking at old pictures from childhood.
Mottainai
A word that means ‘what a waste!’ and expresses regret over this waste. This wastefulness not only pertains to physical resources, but also to a misuse of opportunities and time. It can also be used to deflect praise that one feels isn’t deserved.
Kuidaore
Kuidaore means to go bankrupt because you spend all your money on food and drink.
Tsundoku
This word is made up of the characters for the verb ‘to accumulate, pile up’ and the verb ‘to read’, but it is also a play on tsunde oku, which means to simply pile up something and leave it. It is defined as constantly buying books that accumulate but never get read.